Question

Daryl draws 6 equal size rectangles to make a new, larger rectangle. The area of one of the small rectangles is 12 square cm. and the length of the small rectangle is 4 cm. What is the perimeter/area?
This is for my little sister. This is 3rd grade math

Answer 1

Easy,

If one of the small rectangles area is 12 and its side length is 4..

12/4=3

So the length and width of the small rectangle are length=4 width=3.

For the NEW rectangle take..

12*6=72

That means the NEW rectangles Area is 72 sq. cm.

To find it's Perimeter...

For 1 small triangle take 3+3+4+4=14  (P=l+l+w+w)

Since there are 6 small rectangles take 14*6=84

Thus, the perimeter of the NEW rectangle is 84 cm.

All together the Area and Perimeter of the Rectangle is...

A= 72 sq cm
and
P=84 cm