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A1
Given an Isosoles triangle (looks like a pyramid) where the length of the base is known and the height from the base to the point is known and the two sloped sides are equal angles... how do you calculate the length of the sides, and therefore the perimeter, etc. ???
like, you can divide the isosoles triangle in two escalene triangle, and use the sen or cos. i will explain...
if is isoceles, the height will intersect the base at a 90 degree angle. This will occur at the midpoint of the base. Take half the length of the base, the height and use pythagorean theorem. \[5^{2}+3^{2}=side of \triangle (hyp ^{2})\]