Question 148486
If in your diagram, two legs of the right triangle are congruent, then each leg is 6, because they are probably half the diameter long. 


Area of triangle=(1/2)bh
b=6
h=6


Area of this triangle=1/2(6x6)
Or 1/2(36)


Area=18


If not, then the longest side is probably 12, making the height a radius, or 6.


Area of triangle=(1/2)bh
b=6
h=6


Area of this triangle=1/2(12x6)
Or 1/2(72)


Area=36


I gave you two answers because I don't know what your diagram looks like.