Rectangle ABCD is inscribed in circle O. If the radius measures 7 cm and AB = 10 cm, what is the length of BD?

Answer 1

BD^2 = 14^2 -10^2 = 96

BD = sqr96 = about 9.8 cm

Construct a right triangle with the diameter = 14 as the hypotenuse and 10 as one leg, then use the Pythagorean Theorem to solve for the other leg = BD