Transcript
Page 1: Lesson 10-8 Pages 539-543

Lesson 10-8 Pages 539-543

Area: Irregular Figures

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What you will learn!

How to find the area of irregular figures.

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What you really need to know!

To find the area of an irregular figure, separate the irregular figure into figures whose area you know how to find.

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Example 1:

Find the area of the irregular figure to the nearest tenth.

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Example 1:

There is a square, a triangle, and a quarter of a circle.

4)(

2

1

2

ra

bha

lwa

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Example 1:

There is a square, a triangle, and a quarter of a circle.

4)2(

422

1

22

2

a

a

a

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Example 1:

There is a square, a triangle, and a quarter of a circle.

1.3

4

4

a

a

a

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Example 1:

There is a square, a triangle, and a quarter of a circle.

21.11 in

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Example 2:

Carpeting cost $2 per square foot. How much will it cost to carpet the area shown?

There are two rectangles and one triangle.

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Example 2:

bha

lwa

lwa

2

1

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Example 2:

12142

1

33

1014

a

a

a

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Example 2:

84

9

140

a

a

a

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Example 2:

2233 fta

$2 x 233ft2 =

$466

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Page 541

Guided Practice

#’s 3-6

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Pages 539-541 with someone at home and

study examples!

Read:

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Homework: Pages 542-543

#’s 7-10, 16-22

#’s 26-35

Lesson Check Ch-10

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Study Guide and Review

Pages

544-548

#’s 1-33(Odd answers in back of book)

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Prepare for Test!

Page

549

#’s 1-20 Lesson CheckCh-10

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Prepare for Test!

Pages

550-551

#’s 1-19

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#16 Ch Test 2A

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Page

750

Lesson 10-8

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D’E’

F’G’

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E’

F’

G’

H’

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X’W’

Y’Z’

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8ft

12 ft more

4ft

16 ft

4 ft

A = r2

A = 162

A 804 ft2

A = r2

A = 42

A 50 ft2

804 – 50 = 754 ft2

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3 units 1 unit

9u2

1u2

9 : 1


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