By adding the lengths of the 5 sides together.
length plus width equals perimetre
^Perimetre. Outer length of a shape.
Perimetre of squre is 4*(side) and side is 8 cm so perimetre is 4*8=32cm
4 times the length of its side.
Just add together the 5 equal sides
length plus width equals perimetre
That depends on the size of the pentagon, and whether it is regular or not. In general, you can divide the pentagon into three triangles, and calculate the area of each triangle separately.
The simplest way is to divide the pentagon into three triangles, calculate the area of each of them and sum the answers.
divide the pentagon into 5 equilateral triangles, and calculate their area. (base times height divided by 2) and when you have your answer, multiply it by 5.
^Perimetre. Outer length of a shape.
To calculate the perimeter of a pentagon, add the lengths of all five sides. If the pentagon has sides of equal length, you can multiply the length of one side by 5. If the sides are not equal, you will need to measure each side and add them together.
Perimetre of squre is 4*(side) and side is 8 cm so perimetre is 4*8=32cm
4 times the length of its side.
Just add together the 5 equal sides
this is stupidinuss
It is the sum of its 4 sides added together
1/2*perimetre of base*slant height