The longest side in a right-angled triangle is 12cm. One of the shorter sides is 4 cm. Calculate the perimeter of the triangle
122 = 42 + x2 [This is pythagoras' theorem (a2 = b2 + c2) ]
144 =16 + x 2
128 = x2
11.31 = x
Perimeter = 11.31 + 12 +4 = 27.31
