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Big Ideas Math: Modeling Real Life, Grade 8

BI

Big Ideas Math: Modeling Real Life, Grade 8 View details

Chapter Review

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Exercise 36 Page 95

The ratio between corresponding side lengths is always the same.

10

Practice makes perfect

We are given a pair of similar figures.

similar figures

For similar figures, the ratio between corresponding side lengths is always the same. With this information in mind, we can write a proportion in terms of x. x/20=7/14 We can now isolate x in this equation and find its value.

x/20=7/14

▼

Solve for x

LHS * 20=RHS* 20

x=7/14(20)

MoveRightFacToNum

a/c* b = a* b/c

x=7(20)/14

Multiply

x=140/14

a/b=.a /14./.b /14.

x=10/1

a/1=a

x=10

Subchapter links

1 Translations p.91

2 Reflections p.92

3 Rotations p.92-93

4 Congruent Figures p.93

5 Dilations p.94

6 Similar Figures p.94-95

7 Perimeters and Areas of Similar Figures p.95