What is the surface area

Question

asked Mar 27, 2020 33.8k views

1 Answer

DorkMonstuh · Answer 1 · 2020-03-31T07:02:34+0000

Answer:

Explanation:

We have four congruent triangles and a square in the base.

The formula of an area of a triangle:

$A_\triangle=(1)/(2)bh$

b - base

h - height

The formyla of an area of a square:

$A_{\boxed{}}=a^2$

a - length of side

We have b = 11 in, h = 16 in and a = 11 in. Substitute:

$A_\triangle=(1)/(2)(11)(16)=(11)(8)=88\ in^2\\\\A_{\boxed{}}=11^2=121\ in^2$

The Surface Area :

$S.A.=4A_\triangle+A_{\boxed{}}$

Substitute:

$S.A.=4(88)+121=352+121=473\ in^2$