1.  Phones Cindy Ly 3A

2. Point  A point is a location without shape of size. It has no dimensions.  The silver button represents a “point” T

3. Line  A line has length and points and it has no width or thickness.  The edge of the iPhone represents a “line” A B

4. Line Segment  A line segment is a straight line which links two points without extending beyond them.  The edge of the phone represents a “line segment”. The line starts at point C and ends at point D without extending. C D

5. Ray  A ray is a line with a start point but no end point.  ∞  The phone cord represents a “ray” because it is its start point and it extends infinitely. E F

6. Opposite Rays  Opposite rays must be collinear.  The bottom represents “opposite rays” because G is between H and I, then GH and GI. GI H

7. Parallel Lines  Parallel lines are two lines on a plane that never meet and its always the same distance apart.  The parallel lines is represented by the left and right sides of the phone, J and K. JK

8. Perpendicular Lines  Perpendicular lines is lines meet or crosses at right angles. (90˚)  This represents Perpendicular lines because the lines L and M meet. L M

9. Acute Angle  A acute angle is an angle whose measure is less than 90˚.  The gap between the two phones represents an acute angle because the measure is less than 90˚. N P O

10. Obtuse Angle  A obtuse angle is an angle whose measure is between 90˚ and 180˚.  This represents an “obtuse angle” because the measure of angle QRS is between 90˚ and 180˚. Q R S

11. Right Angle  A right angle is an angle whose measure is exactly 90˚.  This phone represents a right angle because the measure of the corner is exactly 90˚ T U V

12. Vertical Angles  A vertical angle is a pair angles whose sides form opposite rays.  ≅  This represents “vertical angles” because the sides form opposite rays. 1 2

13. Adjacent Angles  A adjacent angle is a pair of angles with a shared vertex and a common side but do not have overlapping interiors.  This represents an “adjacent angle” because it has a pair of angles, 3 and 4, and a common side. 3 4

14. Intersecting Lines  Intersecting lines is the point where two lines meet or cross.  This represents “intersecting lines” because lines A and B intersected and point W is where the two lines crossed. A B W

15. Intersecting Planes  Intersecting planes is two planes that meet in a single line.  This represents “intersecting planes” because planes C and D meet in line XY C D X Y

16. Supplementary Angles  A supplementary angle is a pair of angles whose sum is 180˚.  This represents a “supplementary angle” because angle 5 and 6 has a sum of 180˚. 5 6

17. Complementary Angles  A complementary angle is a pair of angles whose sum is 90˚.  This represents a “complementary angle” because angles 7 and 8 have a sum of 90˚. 7 8

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