See the attached JPG.
Explaination: If you extend AB and BC you will get two overlapping triangle DBE and ABC.
As BA=AD and BC=CE, the sides are in 2:1 proportion. so should be the case with AC and DE(which is diagonal, as angle is 90 degree)
so AC:DE = 1:2 => DE= 12 hence radius will be 6. Area= pi * 36
hence Answer is C.
Solution.JPG [ 6.14 KiB | Viewed 463 times ]
Don't give up on yourself ever. Period.
Beat it, no one wants to be defeated (My journey from 570 to 690) : beat-it-no-one-wants-to-be-defeated-journey-570-to-149968.html