Question

The edge of a cube is 4 inches.

Answer 1

Answer:

Part 1) $A=16\ in^2$

Part 2) $P=16\ in$

Step-by-step explanation:

we know that    

A cube has six equal square faces

A cross-section perpendicular to one face of the cube is equal to a square

see the attached figure to better understand the problem

Part 1) Find the area of the cross section

The area of the square is

$A=b^2$

where

b is the length side of the square

we have

$b=4\ in$

substitute

$A=4^2$

$A=16\ in^2$

Part 2) Find the perimeter of the cross section

The perimeter of the square is

$P=4b$

where

b is the length side of the square

we have

$b=4\ in$

substitute

$P=4(4)$

$P=16\ in$

Answer 2

Answer:

part1 A=16/2 pt2 =16

Step-by-step explanation: