4. In AABC, angleA = 3 anglrB and angleC = 2B + 45°. Find the measure of angle a .
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Step-by-step explanation:
as we know sun of all angles of triangle is l80°
now,
<A + <B + <C = 180°
3<B +<B + 2<B + 45° = 180°
6<B = 180° - 45°
<B = 135°/6
<B = 24.1°
thus <A = 3 x 24.1°
<A = 72.3° ans
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