# 8-3 Notes by samuelcwallace

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```									                   8-3 Areas of Other Figures

Obj: To find the area of trapezoids and other figures.

KEY TERMS:
Bases of a Trapezoid - the sides that are parallel in a trapezoid.

Height of a Trapezoid – the length of the perpendicular segment that connects
the bases.

FORMULA FOR AREA OF A TRAPEZOID:
1
A=      h(b1 + b2 )
2
EXAMPLE PROBLEMS:
9.5 m
1.
1
A=         h(b1 + b2 )
4.4 m                                   2
4.5 m
5m                                                  1
A=         4.4 9.5 + 6
2

A = 2.2 15.5
6m
A = 34.1 ����2
Base 1 = 9.5 m

Base 2 = 6 m

Height = 4.4 m
6 cm
2.
1
7.2 cm             A = ℎ ����1 + ����2
2
6 cm
1
A = (6) (10+6)
2

A = (3) (16)
10 cm
A = 48 ��������2

Height = 6 cm

Base 1 = 10 cm

Base 2 = 6 cm

15 ft
3.

9 ft.
12 ft.                                    12 ft

27 ft.

Here we have an irregular hexagon formed by a rectangle and a trapezoid. If
we find the area of each of the figures separately and then add them together,
we can find the area of the entire figure.

Area of Rectangle                                 Area of Trapezoid
1
A = (base)(height)                                A = ℎ(����1 + ����2 )
2

1
A = (12)(15)                                      A = (12)(12+3)
2

A = 180 �������� 2                                             A = (6)(15)

A = 90 �������� 2
Area of Entire Figure

A = Rectangle + Trapezoid

A = 180 + 90 = 270 ��������.2

```
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