Question: Consider a quarter of a circle of radius 20. Let r be the radius of the circle inscribed in this quarter of a circle. Find r.\nOptions:\n(A) 20*(sqr2 -1) \n(B) 8*(sqr3 -1) \n(C) 4*(sqr7 - 1) \n(D) 12* (sqr7 -1) \n(E) None of these Let's think first. Some random reasoning:
User
I got 20/(sqr2 +1) and just forgot to multiply by (sqr2 -1). The final answer: (A).
Assistant