Answers and Explanations

SOLID GEOMETRY FOLLOW-UP TEST

1 . B

The formula for the lateral surface area    of  a   cone    (which  will    be  provided

in  the test    booklet)    is  in  terms   of  c   =   circumference   and ℓ   =   slant   height.

You can use the given   base    radius  to  get the circumference:

c   =   2πr =   2π(3)   =   6π

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.