Question

if you solve this you are genius!!!

find the area of the shaded region​

radius-- r

this is re-upload of previous question because many were asking for radius ​

Answer 1

Answer:

This problem can be solved with similar triangles property.

The White triangle is similar to the Red one

Now Ratio of sides is 2:3 (as ratio of areas = ratio of based if the height is same)

Seeking that, White triangle = 9/4 * Yellow triangle = 9/2

Following all the above, the Green region = 5.5 units