These triangle formulas can be mathematically expressed as; Area of triangle, A = [ (½) b × h]; where 'b' is the base of the triangle and 'h' is the height of the triangle. Perimeter of a triangle, P = (a + b + c); where 'a', 'b', and 'c' are the 3

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The sum of the angles of a triangle: Always, always, ALWAYS! The Pythagorean Theorem: This formula is for right triangles only! The sides, a and b, of a right triangle are called the legs, and the side that is opposite to the right (90