MathDB
2022 Geometry 5

Source:

March 14, 2022
geometry

Problem Statement

Let triangle ABCABC be such that AB=AC=22AB = AC = 22 and BC=11BC = 11. Point DD is chosen in the interior of the triangle such that AD=19AD = 19 and ABD+ACD=90o\angle ABD + \angle ACD = 90^o . The value of BD2+CD2BD^2 + CD^2 can be expressed as ab\frac{a}{b} , where aa and bb are relatively prime positive integers. Compute 100a+b100a + b.