Add up the sides.
to find the perimiter you just add up all the sides....Perimiter is the same for every figure.
put tape around the perimiter of it.
Add together the 4 sides
Surface Area = 1/2 x {times} the perimiter x {times}it by the the side length
To find the area of a triangle find the base and the height of the triangle. Then multiply the base by the height, then divide by 2. To find the perimiter of a triangle add together the outside edge of the triangle. To find the area of a triangle find the base and the height of the triangle. Then multiply the base by the height, then divide by 2. To find the perimiter of a triangle add together the outside edge of the triangle.
2 * pi * r
Run a piece of string round the edge and then measure it
C = (pi)/d or c = 2(pi)r.
The perimeter is 31.11 units.
simply to find area,distance, and perimiter
Add the lengths of any two adjacent sides, and double the sum.
it is the area of a solid object times by the square root of the perimiter