# Given a triangle with A=130 degrees, a=10cm, b=10cm, How do you find side c and the two other angles, big B and C?

Dec 14, 2016

Since $a = 10 \text{ cm} = b$
$\rightarrow \angle A = {130}^{\circ} = \angle B$
but since the interior angles of a triangle must add up to ${180}^{\circ}$
and $\angle A + \angle B > {180}^{\circ}$