All cross sectional shapes that are parallel or perpendicular to one of the bases of are also congruent to one another

Answer

→→→Cube

In a cube, all the faces which is parallel or perpendicular to one of the faces  are congruent to one another.

Why, not Cuboid because in a cuboid , out of 6 faces , 3 pairs of opposite faces are congruent to one another.

→→→→So, out of all cross sectional shapes that are parallel or perpendicular to one of the bases of a Cube, are also congruent to one another

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk