You measure the sides of the shape you are finding the perimetre of and then add together the measurements. Then you have your answer.
eg: 8cm x 7cm x 3cm x 5cm
8+7+3+5=23
answer is 23cm
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The perimeter of any triangle is the sum of its 3 sides
I don't understand why there are so many questions about rectangles' perimeter. You just add the length and the width and double your answer....
The area of a square that has a perimeter of 32m is: 64 m2
in order to find the perimeter of a shape add up all the sides measurements
You can find out how many angles are in a shape by counting how many edges a shape has. for instance.. a square has 4 edges so it has 4 angles