Anja is creating a triangle using three straws. The two shorter straws have lengths of 20 cm and 21 cm. How long, in centimeters, should the third straw be for Anja to create a right triangle?
a^2 + b^2 = c^2...a and b are the legs and c is the hypotenuse 20^2 + 21^2 = c^2 400 + 441 = c^2 841 = c^2 sqrt 841 = c 29 = c <== third straw will be 29 cm
