Question

Find the length of the radius r

Answer 1

The radius is 7 units.

Answer 2

Explanation:

Use Pythagorean theorem for right triangles

c^2 = a^2 + b^2 where c = hypotenuse and a and b are the legs

8.6^2 = 5^2 + r^2

8.6^2 - 5^2 = r^2

r = ~ 7 units