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Classification of Triangles Based on Angles

Find the meas...

Question

Find the measure of angle $a$ in the given triangles without measuring

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Solution

$\begin{matrix} W h e n t w o s i d e s a r e e q u a l t h e r e o p p o s i t e a n g l e s a r e e q u a l a + 115^{0} = 180^{0} (l i n e a r p a i r) a = 180^{0} - 115^{0} = 65^{0} \end{matrix}$

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