Hi guys,
Solution 0f followup question using Pythagorean Theorem and same side ids given h^2 =a1 x b1
h^2 + a1^2 =a^2
h^2 + b1^2 =b^2
2h^2 + a1^2 + b1^2 =a^2 + b^2
2a1xb1 + a1^2 + b1^2 = a^2 +b^2
(a1 + b1 )^2 = a^2 + b^2
triangle is a right triangle