Answers and Explanations
SOLID GEOMETRY FOLLOW-UP TEST
1 . A
The formula for the lateral surface area of a cone is in terms of c = circumference and ℓ =
slant height. You can use the given base radius to solve for the slant height:
You can think of the slant height as the hypotenuse of a right triangle whose legs are the
base radius and height of the cone.
Now you can see that the triangle is a 3-4-5 and that h = 8. Plug r = 6 and h = 8 into the
volume formula: