# math

posted by
**mathsen**
.

Let ABC be a triangle such that angle ACB = 135 degrees. Prove that

AB^2 = AC^2 + BC^2 + ¡Ì2 x AC x BC.

posted by
**mathsen**
.

Let ABC be a triangle such that angle ACB = 135 degrees. Prove that

AB^2 = AC^2 + BC^2 + ¡Ì2 x AC x BC.