To find the perimeter of something all you have to do is,
MEASURE THE DISTANCE AROUND THE OBJECT, for example if you have a triangle and the left side is 8cm, the right side is 5cm, and the bottom is 3cm, add the three measurements, 8cm + 5cm + 3cm = 16cm
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So that you can find out how long it will tkae you go around it
The perimeter of a triangle is the distance around it. Add the lengths of the three sides to find the perimeter.
you can only find the perimeter of shapes, honey, not fractions.
To find the perimeter of a figure, add all the lengths of the edges of the figure. The sum of the sides is the perimeter.
find the perimeter and area of a rectangle that is 15cm long and 5cm wide