8 th Grade Math Chapter 7b Review. Chapter 7b Review 1)Are the following numbers perfect squares? a)81 b)75 c)1.

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Presentation transcript:

8 th Grade Math Chapter 7b Review

Chapter 7b Review 1)Are the following numbers perfect squares? a)81 b)75 c)1

1)Are the following numbers perfect squares? a)81 b)75 c)1 Chapter 7b Review Answer yes no yes

Chapter 7b Review 2)Round to the nearest hundredth. a)√75 b)√ 36 / 49

2)Round to the nearest hundredth. a)√75 b)√ 36 / 49 Chapter 7b Review Answer ≈ 8.66 = 6 / 7 ≈ 0.86

Chapter 7b Review 3) a)Give both the principal and negative square roots of 16. b)A square has an area of 64 ft 2. What is the length of each side?

3) a)Give both the principal and negative square roots of 16. b)A square has an area of 64 ft 2. What is the length of each side? Chapter 7b Review Answer  4 8 ft

Chapter 7b Review 4) a)Write the Pythagorean Theorem formula. b)Find the length of the missing side x

4) a)Write the Pythagorean Theorem formula. b)Find the length of the missing side. Chapter 7b Review Answer a 2 + b 2 = c 2 x = x

Chapter 7b Review 5) a)Find the length of the missing side y

5) a)Find the length of the missing side. Chapter 7b Review Answer y = y

Chapter 7b Review 6)A tower needs stabilizing wires. The tower is 100 ft tall. The wires will be attached at the top of the tower and 40 ft from the base. How long does the wire need to be? wire 100 feet 40 feet

6)A tower needs stabilizing wires. The tower is 100 ft tall. The wires will be attached at the top of the tower and 40 ft from the base. How long does the wire need to be? Chapter 7b Review Answer wire = feet wire 100 feet 40 feet