The rectangle perimeter
Geometry
Level
2
The rectangle above is made up of 12 congruent squares. Find the perimeter of the rectangle (in centimeter) if the area of the rectangle is equal to 432 square cm.
The answer is 84.
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
1 solution
If the side of one of the squares is a , then the area of the rectangle is 1 2 a 2 = 4 3 2 , so a = 6 .
Perimeter is 2 ( 4 a + 3 a ) = 1 4 a = 1 4 × 6 = 8 4