Question

Which of the following formulas would find the surface area of a right cylinder where h is the height, r is the radius, LA is the lateral area, and BA is the base area?

Check all that apply.

A. pie r^2+pie r(radius)h(height)

Answer 1

B) 2πr² + 2πrh; C) BA + LA

Explanation:

To find the surface area of a figure, we add the base area and the lateral area. This is C, BA + LA.

In a cylinder, the lateral area is the area of a rectangle. Think of a label wrapped around a can of soup. The length of the rectangle is the measure of the circumference; this is given by 2πr. The width of the rectangle is the height of the can, or h; this gives us the area 2πr(h).

The bases of a cylinder are circles. The area of a circle is πr²; since there are 2 bases, this gives us 2πr².

Together this makes the surface area 2πr²+2πrh

Answer 2

wrong bro don't thank him its C)BA+LA and B)2pie r^2+2pie rh