find the length of the hypotnuse of a right triangle with legs of 9cm and 12cm
x^2 = 9^2 + 12^2
x = ...
Did you realize that 9 and 12 are multiples of the basic 3-4-5 right-angled triangle?
x = ...
Did you realize that 9 and 12 are multiples of the basic 3-4-5 right-angled triangle?