CPM Homework Help : INT2 Problem 11-9

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11-9.

In the circle below, $CD$ is a diameter. If $AE = 10$ , $CE = 4$ , and $AB = 16$ , what is the length of the radius of the circle?

Step 1:

$\frac{AE}{CE} = \frac{DE}{BE},\;\text{so}\; \frac{10}{4}=\frac{DE}{6}$

Hint:

$DE = 15$

Answer:

$9.5$

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