Question

How to calculate third side of a tringle if two sides are known?

Answer 1

For example,  We know that,  ∆A+∆B+∆C =180° . Now ,  ∆A+∆B+∆C=180°. 110°+35°+x=180°. 145°+x=180°. x=180°–140°. x=35°.