Question

Consider the circle below what is the length of the radius

Answer 1

Given:

Here AE=4 and AM=9 is given and angle A is right angle means 90

Required:

We have to find the value of r means radius

Explanation:

If the radius is r than AG=r-4

now use the Pythagoras theorem for A is right angle

$r^2=9^2+(r-4)^2$$r^2=81+r^2-8r+16$$8r=97$$r=12.125$

Final answer:

The length of radius is 12.1 as option a