trigonometry

Question: If in a triangle $ABC,$ $(s-a)(s-b)=s\,\,(s-c)$ , then angle C is equal to

1) ${{90}^{o}}$

2) ${{45}^{o}}$

3) ${{30}^{o}}$

4) ${{60}^{o}}$

Solution:

Explanation: No Explanation

Relation between sides and angles Solutions of triangles

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