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Pehaps because perimeter is not a word they normally come across.
you add up the measures of the sides Perimeter=a+b+c
Legnth of the sides and then you add them up to get the perimeter
You determine the perimeter of an object by adding up the lengths of all sides.
Add up all the sides of the object you're trying to find the perimeter for.
Yes, for the perimeter of a polygon, you add up all the sides.
for perimeter all you do is add up all the lengths of the sides.
Perimeter didn't 'come from' anywhere. The concept of 'how long is the bottom of the outside of this thing' has always existed. Perimeter is just the name for 'how long is the bottom of the outside of this thing'. As an example, the perimeter of any one of the pyramids has always been the same.About 1600, the English word 'perimeter' was first used to describe 'the distance around the outside of stuff'But, that distance was the same long before that!
The perimeter is the sum of all of the sides of the figure. So, simply add up ALL the sides to discover what the perimeter is.
a perimeter is the distance around an object, so just add the sides up
To find the perimeter of a triangle add up all three sides.
To find the perimeter of any polygon, add up the lengths of all the sides.