In - ABC- - A - 43o and - C - 70o- What is the measure of - B-

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Angle Sum Property of a Triangle

In Δ ABC, ...

Question

In $Δ A B C,$ $∠ A = 43^{o}$ and $∠ C = 70^{o} .$ What is the measure of $∠ B ?$

63^{o}

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65^{o}

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66^{o}

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67^{o}

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\frac{c o s e c^{2} 63^{o} + {tan}^{2} 24^{o}}{{cot}^{2} 66^{o} + {sec}^{2} 27^{o}} + \frac{{sin}^{2} 63^{o} + {cos}^{2} 63^{o} sin 27^{o} + sin 27^{o} sec 63^{o}}{2 (c o {sec}^{2} 65^{o} - {tan}^{2} 25^{o})}

Δ A B C

∠ A = 65^{o}

∠ B = 70^{o}

∠ C

Δ A B C, ∠ A = 56^{o}

∠ B = 60^{o} .

∠ C ?

∠ D A B = 70^{o}

∠ D B C = 65^{o}

∠ C D B

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