CPM Homework Banner

Home > CCG > Chapter 10 > Lesson 10.1.5 > Problem 10-54


In the diagram at right, has radius feet and has radius feet. is tangent to both and . If feet, find .  

Think about how the radius of will affect .
How will the radius of affect ?

After finding the lengths of  and , find lengths of the remaining sides.


because and and by the definition of a tangent.

Use Pythagorean Theorem to find the last side.