1. line A straight path that extends
A straight path that extends
in both directions without end; marked with an arrowhead at
each end.

2. A piece of a line that has
line segment
A piece of a line that has
two endpoints.

3. parallel lines
Two (or more) lines that run the same distance apart at every point and will never intersect.
para el ll
lines

4. A line with one end point that extends non-stop in the
ray
A line with one end point that extends non-stop in the
opposite direction.

5. A shape formed by two rays that share an endpoint.
angle
A shape formed by two rays that share an endpoint.

6. vertex plural: vertices The point where:
two or more rays share an endpoint.
the edges of a solid figure meet.
The point at the top of a cone.

7. intersecting lines
Two or more lines that
meet or cross at a point.

8. Two lines that intersect
perpendicular lines
Two lines that intersect
and form right angles.

9. Tool used to measure angles.
protractor
Tool used to measure angles.

10. 1 rotation = 90° 2 rotations = 180° 3 rotations = 270°
A full circle rotation is equal to 360° (degrees)
When divided into four equal sections, each section is worth 90°
1 rotation = 90°
2 rotations = 180°
3 rotations = 270°
4 rotations = 360°
360°
90°
90°
90°
270°
90°
90°
90°
90°
90°
180°

11. An angle measuring 90 degrees.
right angle
An angle measuring 90 degrees.

12. acute angle
An angle that measures
LESS than 90 degrees.

13. obtuse angle
An angle that measures
MORE than 90 degrees.

14. straight angle
An angle that measures
180 degrees.

15. line A straight path that extends
A straight path that extends
in both directions without end; marked with an arrowhead at
each end.

16. A piece of a line that has
line segment
A piece of a line that has
two endpoints.

17. parallel lines
Two (or more) lines that run the same distance apart at every point and will never intersect.
para el ll
lines

18. A line with one end point that extends non-stop in the
ray
A line with one end point that extends non-stop in the
opposite direction.

19. A shape formed by two rays that share an endpoint.
angle
A shape formed by two rays that share an endpoint.

20. vertex plural: vertices The point where:
two or more rays share an endpoint.
the edges of a solid figure meet.
The point at the top of a cone.

21. intersecting lines
Two or more lines that
meet or cross at a point.

22. Two lines that intersect
perpendicular lines
Two lines that intersect
and form right angles.

23. Tool used to measure angles.
protractor
Tool used to measure angles.

24. 1 rotation = 90° 2 rotations = 180° 3 rotations = 270°
A full circle rotation is equal to 360° (degrees)
When divided into four equal sections, each section is worth 90°
1 rotation = 90°
2 rotations = 180°
3 rotations = 270°
4 rotations = 360°
360°
90°
90°
90°
270°
90°
90°
90°
90°
90°
180°

25. An angle measuring 90 degrees.
right angle
An angle measuring 90 degrees.

26. acute angle
An angle that measures
LESS than 90 degrees.

27. obtuse angle
An angle that measures
MORE than 90 degrees.

28. straight angle
An angle that measures
180 degrees.

29. line A straight path that extends
A straight path that extends
in both directions without end; marked with an arrowhead at
each end.

30. A piece of a line that has
line segment
A piece of a line that has
two endpoints.

31. parallel lines
Two (or more) lines that run the same distance apart at every point and will never intersect.
para el ll
lines

32. A line with one end point that extends non-stop in the
ray
A line with one end point that extends non-stop in the
opposite direction.

33. A shape formed by two rays that share an endpoint.
angle
A shape formed by two rays that share an endpoint.

34. vertex plural: vertices The point where:
two or more rays share an endpoint.
the edges of a solid figure meet.
The point at the top of a cone.

35. intersecting lines
Two or more lines that
meet or cross at a point.

36. Two lines that intersect
perpendicular lines
Two lines that intersect
and form right angles.

37. Tool used to measure angles.
protractor
Tool used to measure angles.

38. 1 rotation = 90° 2 rotations = 180° 3 rotations = 270°
A full circle rotation is equal to 360° (degrees)
When divided into four equal sections, each section is worth 90°
1 rotation = 90°
2 rotations = 180°
3 rotations = 270°
4 rotations = 360°
360°
90°
90°
90°
270°
90°
90°
90°
90°
90°
180°

39. An angle measuring 90 degrees.
right angle
An angle measuring 90 degrees.

40. acute angle
An angle that measures
LESS than 90 degrees.

41. obtuse angle
An angle that measures
MORE than 90 degrees.

42. straight angle
An angle that measures
180 degrees.

43. line A straight path that extends
A straight path that extends
in both directions without end; marked with an arrowhead at
each end.

44. A piece of a line that has
line segment
A piece of a line that has
two endpoints.

45. parallel lines
Two (or more) lines that run the same distance apart at every point and will never intersect.
para el ll
lines

46. A line with one end point that extends non-stop in the
ray
A line with one end point that extends non-stop in the
opposite direction.

47. A shape formed by two rays that share an endpoint.
angle
A shape formed by two rays that share an endpoint.

48. vertex plural: vertices The point where:
two or more rays share an endpoint.
the edges of a solid figure meet.
The point at the top of a cone.

49. intersecting lines
Two or more lines that
meet or cross at a point.

50. Two lines that intersect
perpendicular lines
Two lines that intersect
and form right angles.

51. Tool used to measure angles.
protractor
Tool used to measure angles.

52. 1 rotation = 90° 2 rotations = 180° 3 rotations = 270°
A full circle rotation is equal to 360° (degrees)
When divided into four equal sections, each section is worth 90°
1 rotation = 90°
2 rotations = 180°
3 rotations = 270°
4 rotations = 360°
360°
90°
90°
90°
270°
90°
90°
90°
90°
90°
180°

53. An angle measuring 90 degrees.
right angle
An angle measuring 90 degrees.

54. acute angle
An angle that measures
LESS than 90 degrees.

55. obtuse angle
An angle that measures
MORE than 90 degrees.

56. straight angle
An angle that measures
180 degrees.

57. line A straight path that extends
A straight path that extends
in both directions without end; marked with an arrowhead at
each end.

58. A piece of a line that has
line segment
A piece of a line that has
two endpoints.

59. parallel lines
Two (or more) lines that run the same distance apart at every point and will never intersect.
para el ll
lines

60. A line with one end point that extends non-stop in the
ray
A line with one end point that extends non-stop in the
opposite direction.

61. A shape formed by two rays that share an endpoint.
angle
A shape formed by two rays that share an endpoint.

62. vertex plural: vertices The point where:
two or more rays share an endpoint.
the edges of a solid figure meet.
The point at the top of a cone.

63. intersecting lines
Two or more lines that
meet or cross at a point.

64. Two lines that intersect
perpendicular lines
Two lines that intersect
and form right angles.

65. Tool used to measure angles.
protractor
Tool used to measure angles.

66. 1 rotation = 90° 2 rotations = 180° 3 rotations = 270°
A full circle rotation is equal to 360° (degrees)
When divided into four equal sections, each section is worth 90°
1 rotation = 90°
2 rotations = 180°
3 rotations = 270°
4 rotations = 360°
360°
90°
90°
90°
270°
90°
90°
90°
90°
90°
180°

67. An angle measuring 90 degrees.
right angle
An angle measuring 90 degrees.

68. acute angle
An angle that measures
LESS than 90 degrees.

69. obtuse angle
An angle that measures
MORE than 90 degrees.

70. straight angle
An angle that measures
180 degrees.

71. line A straight path that extends
A straight path that extends
in both directions without end; marked with an arrowhead at
each end.

72. A piece of a line that has
line segment
A piece of a line that has
two endpoints.

73. parallel lines
Two (or more) lines that run the same distance apart at every point and will never intersect.
para el ll
lines

74. A line with one end point that extends non-stop in the
ray
A line with one end point that extends non-stop in the
opposite direction.

75. A shape formed by two rays that share an endpoint.
angle
A shape formed by two rays that share an endpoint.

76. vertex plural: vertices The point where:
two or more rays share an endpoint.
the edges of a solid figure meet.
The point at the top of a cone.

77. intersecting lines
Two or more lines that
meet or cross at a point.

78. Two lines that intersect
perpendicular lines
Two lines that intersect
and form right angles.

79. Tool used to measure angles.
protractor
Tool used to measure angles.

80. 1 rotation = 90° 2 rotations = 180° 3 rotations = 270°
A full circle rotation is equal to 360° (degrees)
When divided into four equal sections, each section is worth 90°
1 rotation = 90°
2 rotations = 180°
3 rotations = 270°
4 rotations = 360°
360°
90°
90°
90°
270°
90°
90°
90°
90°
90°
180°

81. An angle measuring 90 degrees.
right angle
An angle measuring 90 degrees.

82. acute angle
An angle that measures
LESS than 90 degrees.

83. obtuse angle
An angle that measures
MORE than 90 degrees.

84. straight angle
An angle that measures
180 degrees.

85. line A straight path that extends
A straight path that extends
in both directions without end; marked with an arrowhead at
each end.

86. A piece of a line that has
line segment
A piece of a line that has
two endpoints.

87. parallel lines
Two (or more) lines that run the same distance apart at every point and will never intersect.
para el ll
lines

88. A line with one end point that extends non-stop in the
ray
A line with one end point that extends non-stop in the
opposite direction.

89. A shape formed by two rays that share an endpoint.
angle
A shape formed by two rays that share an endpoint.

90. vertex plural: vertices The point where:
two or more rays share an endpoint.
the edges of a solid figure meet.
The point at the top of a cone.

91. intersecting lines
Two or more lines that
meet or cross at a point.

92. Two lines that intersect
perpendicular lines
Two lines that intersect
and form right angles.

93. Tool used to measure angles.
protractor
Tool used to measure angles.

94. 1 rotation = 90° 2 rotations = 180° 3 rotations = 270°
A full circle rotation is equal to 360° (degrees)
When divided into four equal sections, each section is worth 90°
1 rotation = 90°
2 rotations = 180°
3 rotations = 270°
4 rotations = 360°
360°
90°
90°
90°
270°
90°
90°
90°
90°
90°
180°

95. An angle measuring 90 degrees.
right angle
An angle measuring 90 degrees.

96. acute angle
An angle that measures
LESS than 90 degrees.

97. obtuse angle
An angle that measures
MORE than 90 degrees.

98. straight angle
An angle that measures
180 degrees.

99. line A straight path that extends
A straight path that extends
in both directions without end; marked with an arrowhead at
each end.

100. A piece of a line that has
line segment
A piece of a line that has
two endpoints.

101. parallel lines
Two (or more) lines that run the same distance apart at every point and will never intersect.
para el ll
lines

102. A line with one end point that extends non-stop in the
ray
A line with one end point that extends non-stop in the
opposite direction.

103. A shape formed by two rays that share an endpoint.
angle
A shape formed by two rays that share an endpoint.

104. vertex plural: vertices The point where:
two or more rays share an endpoint.
the edges of a solid figure meet.
The point at the top of a cone.

105. intersecting lines
Two or more lines that
meet or cross at a point.

106. Two lines that intersect
perpendicular lines
Two lines that intersect
and form right angles.

107. Tool used to measure angles.
protractor
Tool used to measure angles.

108. 1 rotation = 90° 2 rotations = 180° 3 rotations = 270°
A full circle rotation is equal to 360° (degrees)
When divided into four equal sections, each section is worth 90°
1 rotation = 90°
2 rotations = 180°
3 rotations = 270°
4 rotations = 360°
360°
90°
90°
90°
270°
90°
90°
90°
90°
90°
180°

109. An angle measuring 90 degrees.
right angle
An angle measuring 90 degrees.

110. acute angle
An angle that measures
LESS than 90 degrees.

111. obtuse angle
An angle that measures
MORE than 90 degrees.

112. straight angle
An angle that measures
180 degrees.

113. line A straight path that extends
A straight path that extends
in both directions without end; marked with an arrowhead at
each end.

114. A piece of a line that has
line segment
A piece of a line that has
two endpoints.

115. parallel lines
Two (or more) lines that run the same distance apart at every point and will never intersect.
para el ll
lines

116. A line with one end point that extends non-stop in the
ray
A line with one end point that extends non-stop in the
opposite direction.

117. A shape formed by two rays that share an endpoint.
angle
A shape formed by two rays that share an endpoint.

118. vertex plural: vertices The point where:
two or more rays share an endpoint.
the edges of a solid figure meet.
The point at the top of a cone.

119. intersecting lines
Two or more lines that
meet or cross at a point.

120. Two lines that intersect
perpendicular lines
Two lines that intersect
and form right angles.

121. Tool used to measure angles.
protractor
Tool used to measure angles.

122. 1 rotation = 90° 2 rotations = 180° 3 rotations = 270°
A full circle rotation is equal to 360° (degrees)
When divided into four equal sections, each section is worth 90°
1 rotation = 90°
2 rotations = 180°
3 rotations = 270°
4 rotations = 360°
360°
90°
90°
90°
270°
90°
90°
90°
90°
90°
180°

123. An angle measuring 90 degrees.
right angle
An angle measuring 90 degrees.

124. acute angle
An angle that measures
LESS than 90 degrees.

125. obtuse angle
An angle that measures
MORE than 90 degrees.

126. straight angle
An angle that measures
180 degrees.

127. line A straight path that extends
A straight path that extends
in both directions without end; marked with an arrowhead at
each end.

128. A piece of a line that has
line segment
A piece of a line that has
two endpoints.

129. parallel lines
Two (or more) lines that run the same distance apart at every point and will never intersect.
para el ll
lines

130. A line with one end point that extends non-stop in the
ray
A line with one end point that extends non-stop in the
opposite direction.

131. A shape formed by two rays that share an endpoint.
angle
A shape formed by two rays that share an endpoint.

132. vertex plural: vertices The point where:
two or more rays share an endpoint.
the edges of a solid figure meet.
The point at the top of a cone.

133. intersecting lines
Two or more lines that
meet or cross at a point.

134. Two lines that intersect
perpendicular lines
Two lines that intersect
and form right angles.

135. Tool used to measure angles.
protractor
Tool used to measure angles.

136. 1 rotation = 90° 2 rotations = 180° 3 rotations = 270°
A full circle rotation is equal to 360° (degrees)
When divided into four equal sections, each section is worth 90°
1 rotation = 90°
2 rotations = 180°
3 rotations = 270°
4 rotations = 360°
360°
90°
90°
90°
270°
90°
90°
90°
90°
90°
180°

137. An angle measuring 90 degrees.
right angle
An angle measuring 90 degrees.

138. acute angle
An angle that measures
LESS than 90 degrees.

139. obtuse angle
An angle that measures
MORE than 90 degrees.

140. straight angle
An angle that measures
180 degrees.