Oh, dude, finding the perimeter of a triangle with just one measurement is like finding out your favorite show got canceled - disappointing. But hey, if you've got one side length, just triple it, because triangles have three sides, get it? So, like, if one side is 5 units long, the perimeter would be 15 units. Easy peasy, lemon squeezy.
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If the triangle is equilateral, you don't have a problem, but if not you have to measure the sides.
to find the area of a triangle you divide the base of the triangle by two and multiply your answer by the height .so your formula would be 1/2b times h to find the perimeter of a triangle u simply just add the sides.
Find out what 1 side is and multiply by 3 to find perimeter
-- Area of a triangle = 1/2 of (length of the base times height) -- Perimeter of a triangle = (length of one side) + (length of another side) + (length of last side)
Perimeter of a triangle = (length of side #1) + (length of side #2) + (length of side #3)
For finding the area of triangle with the help of Heron's formula: [s(s-a)(s-b)(s-c)]1/2 where a,b,c are sides of the triangle and s=1/2 of perimeter of the triangle