In $△ A B C$ , $∠ A = 75^{o}, ∠ B = 65^{o}$ find $∠ C$

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Solution

We know that in $△ A B C$ ,
$∠ A + ∠ B + ∠ C = 180^{o}$
$75^{o} + 65^{o} + ∠ C = 180^{o}$
$∠ C = 180^{o} - 75^{o} - 65^{o}$
$∴ ∠ C = 40^{o}$

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∠ B A C = 65^{o}, ∠ B C A = 75^{o}

∠ R O Q

△ A B C \sim △ D E F

∠ B = 65^{o}, ∠ C = 82^{o}, ∠ D = 33^{o}, ∠ F = 65^{o}

a = 2, B = 60^{o} a n d C = 75^{o}

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Δ A B C

∠ A = 65^{o}

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△ A B C

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