Sunday, December 2, 2012

Test: Rational World Problem Question #4

4. The figure below is composed of seven congruent squares. The area is 43.75 cm2. Calculate its perimeter. 

A = area 
P = perimeter  
A = 43.75 cm 

 7 congruent squares 
14 congruent squares = P 

First divide the area of the shape by the number of congruent squares to get the area of one  square.

Find the square root of the area of one square to get the side length. 

Multiply the side length of one square by the number of sides to get the perimeter. 

Algebraic Way 

The perimeter of the shape is 35 cm.

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