Calculate Rectangle Perimeter: Finding ABCD with Measurements 8, 5, and 3

Question

ABCD and EBFC are rectangles.

Calculate the perimeter of rectangle ABCD.

00:00 Find the perimeter of rectangle ABCD

00:03 Opposite sides are equal in a rectangle

00:25 The whole side equals the sum of its parts

00:36 Opposite sides are equal in a rectangle

00:46 The perimeter of the rectangle equals the sum of its sides

01:01 And this is the solution to the question

Since in a rectangle every pair of opposite sides are equal to each other, we can claim that:

$EF=BC=AD=5$

$FC=EB=3$

Now we can calculate side AB:

$8+3=11$

Since AB and CD are equal to each other, side CD is also equal to 11

Let's calculate the perimeter of the rectangle:

$11+5+11+5=22+10=32$