Question

A square pyramid is shown below I need this done soon and now So The BRAINLEST points are high​

Answer 1

Answer:

$\large\boxed{S.A.=61.25\ cm^2}$

Step-by-step explanation:

We have the square and four congruent triangles.

The formula of an area of a square with side a:

$A_{square}=a^2$

The formula of an area of a triangle:

$A_{triangle}=\dfrac{bh}{2}$

b - base

h - height

SQUARE:

$A_{square}=(3.5)^2=12.25\ cm^2$

TRIANGLE:

$A_{triangle}=\dfrac{(3.5)(7)}{2}=\dfrac{24.5}{2}=12.25\ cm^2$

Surface Area of the square pyramid:

$S.A.=A_{square}+4A_{triangle}$

Substitute:

$S.A.=12.25+4(12.25)=12.25+49=61.25\ cm^2$