Answer:

Step-by-step explanation:
The formula of a lateral area of a cone:

r - radius
l - slant height
The formula of a surface area of a cone:

We have r= 8in and l = 21in. Substitute:


Answer:
no this cant form a right triangle but can form a regular triangle
Step-by-step explanation:
Length times width so that would be 21
5 + 9 + 2 = 16
We choose one of sixteen, =>
A. 1/16