Fine the area of the shaded region in the figure on the foll

Fine the area of the shaded region in the figure on the following page, give that AB - CD = 4 and BC = 8. (A) 40pi (B) 32pi (C) 68pi (D) 76pi (E) 36pi 33. In the cube ABCDEFGH with side AB = 2, what is the length of diagomal AF? (A) 2 (B) 2Squaqreroot2 (C) 2Squareroot3 (D) 4 (E) 2Squareroot5

Solution

33. The length of diagonal AF is 2(2)^1/2

32. circumference of semisircle is C=2pi *r

2*pi (16-4-4+8)=2 *16 pi=32 pi