Answer:
4. x = 49
5. 87 sq. in.
6. 384, 240, 384 sq. in.
Explanation:
4. Because tangents to a circle from the same point are equal in length, x = y = 49.
5. Rodney's pizza is a 100° sector of the pizza and thus has area
.
6. The volume is base*height/3, which in this case is 12*12*8/3 = 384. The surface area is the square + 4 of the triangles, which in this case is 12*12 + 4(12*10/2) = 384. The lateral surface area is the previous number minus the base, which would then be 384 - 12*12 = 240.