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McGraw Hill Integrated II, 2012

MH

McGraw Hill Integrated II, 2012 View details

1. Circles and Circumference

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Exercise 6 Page 719

Use the Segment Addition Postulate.

5 in.

Practice makes perfect

Consider the given diagram.

To find FB, we will use the Segment Addition Postulate. Let's first recall the relationship between a radius and a diameter of a circle. r=d/2 We are given that the diameter of ⊙ A is 8 inches, so its radius AF=8 ÷ 2 = 4 inches. We are also given that the diameter of ⊙ B is 18 inches, so its radius AB=18÷2= 9 inches. With this information, we can find FB.

AF + FB = AB

FA= 4, AB= 9

4 + FB = 9

LHS-4=RHS-4

FB=5

Subchapter links

Exercises p.719-723