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Geometry Review.

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Presentation on theme: "Geometry Review."— Presentation transcript:

1 Geometry Review

2 Quadrilaterals

3 What does “Quad” mean?

4 Quad means 4

5 How many sides does a quadrilateral have?

6 A quadrilateral has 4 sides!

7 These are all quadrilaterals!

8 Kinds of quadrilaterals – see if you can name them!

9 p _ _ _ _ _ _ _ _ _ _

10 parallelogram two sets of parallel sides

11 r _ _ _ _ _ _ 3 in. 3 in. 3 in. 3 in.

12 rhombus – all the sides are equal in length

13 t _ _ _ _ _ _ _ _

14 trapezoid – only one pair of parallel sides

15 s _ _ _ _ _

16 square – has right angles and ALL sides are the same length

17 r _ _ _ _ _ _ _ _

18 rectangle

19 Other important polygons you need to know

20 PENTAGON Five sides, five angles

21 Hint: an octopus has 8 legs

22 Eight sides, eight angles
OCTAGON Eight sides, eight angles

23 Hint: Six has an X – so does the name of this shape.

24 HEXAGON Six sides, six angles

25 Points, Lines, and Segments

26 p _ _ _ _ A

27 point A

28 l _ _ _ B C

29 line B C

30 l _ _ _ s _ _ _ _ _ _ _ K S

31 line segment K S

32 r _ _ S L

33 ray S L

34 p _ _ _ _ _ _ _ lines A B C D

35 parallel lines two lines that will never cross
B C D

36 i _ _ _ _ _ _ _ _ _ _ _ lines X C Y D E F R S

37 intersecting lines lines that will cross if extended
Y D E F R S

38 p _ _ _ _ _ _ _ _ _ _ _ _ lines F S T G

39 perpendicular lines lines that cross to form right angles

40 Angles

41 o _ _ _ _ _ angle

42 obtuse angle bigger than a right angle – more than 90 degrees

43 a _ _ _ _ angles Katie Smith © 2012

44 acute angles are smaller than a right angle – less than 90 degrees

45 r _ _ _ _ angles

46 right angles look like the letter L and are 90 degrees

47 Perimeter

48 Think of Jurassic Park: “Secure the Perimeter
Think of Jurassic Park: “Secure the Perimeter!” means get the fences ready!

49 Perimeter = the measurement All the way around an object
Perimeter = the measurement All the way around an object *Add all the sides to find the perimeter!* 4 in. 6 in. 3 in.

50 What is the perimeter of the triangle?
4 in. 6 in. 3 in.

51 P=13 inches 4 in. 6 in. 3 in.

52 Area

53 Area is the measurement inside of an object.

54 Find the area by multiplying the sides
Find the area by multiplying the sides. length x width = l x w What is the area of this rectangle? 7 in. 4 in.

55 Find the area by multiplying the sides
Find the area by multiplying the sides. length x width = l x w What is the area of this rectangle? 7 in. A=28 square inches 7x4=28 4 in.

56 What is the area of this square?

57 What is the area of this square?
Area=25 square feet 5x5=25 5 ft.

58 What is the area of this rectangle?
7 in. 3 in. 3 in. 7 in.

59 What is the area of this rectangle?
7 in. Area=21 square inches 7x3=21 3 in. 3 in. 7 in.

60 Types of Triangles

61 Triangles can be named by the lengths of their sides.

62 e _ _ _ _ _ _ _ _ _ _ triangle 3 in. 3 in. 3 in.

63 equilateral triangle all the sides are equal in length

64 Hint: think about an icicle
i _ _ _ _ _ _ _ _ triangle Hint: think about an icicle 10 in. 10 in.

65 isosceles triangle two of the sides are equal
10 in. 10 in.

66 Hint: think about the scales on a dinosaur
s _ _ _ _ _ _ triangle Hint: think about the scales on a dinosaur 4 in. 6 in. 7 in.

67 scalene triangle none of the sides are the same length
4 in. 6 in. 7 in.

68 3-D SHAPES

69

70 c _ _ _ _ _ _ _

71 cylinder

72 c _ _ _

73 cube

74 s _ _ _ _ _

75 sphere

76 p _ _ _ _ _ _

77 pyramid

78 c _ _ _

79 cone

80 r _ _ _ _ _ _ _ _ _ _ p _ _ _ _

81 rectangular prism

82 t _ _ _ _ _ _ _ _ _ p _ _ _ _

83 triangular prism

84 Great job Mathematicians!!!

85

86


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