Areas: Parallelograms, Triangles, and Trapezoids - PowerPoint PPT Presentation

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Areas: Parallelograms, Triangles, and Trapezoids

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Areas: Parallelograms, Triangles, and Trapezoids. Page 531. page 531 ... Trapezoid is a polygon with four sides, two of which the bases are parallel. page 533 ... – PowerPoint PPT presentation

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Title: Areas: Parallelograms, Triangles, and Trapezoids


1
Chapter 9.4
  • Areas Parallelograms, Triangles, and Trapezoids
  • Page 531

2
page 531
A parallelogram is a four sided figure with two
pairs of parallel sides
3
page 531
Parallelograms
4
page 531
The area of a parallelogram A b x h
height
base
5
page 531
Find the area of a parallelogram A b x h
5 km
7 km
6
page 531
Find the area of a parallelogram A b x h
6 m
1.2 m
7
page 531
Find the area of a parallelogram A b x h
h
b
8
page 531
Find the area of a triangle A b x h
h
b
9
page 531
Find the area of a triangle
h
b
10
page 531
Find the area of a triangle
6 m
9 m
11
page 532
Find the area of a triangle
5.5 cm
6.25 cm
12
page 533
Trapezoid is a polygon with four sides, two of
which the bases are parallel.
13
page 533
Put these two trapezoids together.
a
b
a
b
14
page 533
Put these two trapezoids together.
a
b
a
b
15
page 533
This makes a parallelogram whose base is the sum
of a and b
a
b
a
b
16
page 533
The area of this parallelogram is the base (a
b) times the height h
a
b
h
a
b
17
page 533
This can be represented by
a
b
h
a
b
18
page 533
The trapezoidal area is half of this
b
h
a
19
page 534
Find the area
12 cm
7 cm
18 cm
20
page 534
  • Find the area of this kite

13.5 in
4 in
4 in
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