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Angle Sum Property

In a DEF, i...

Question

In a $△ D E F$ , if $∠ E = 105^{o}$ and $∠ F = 40^{o}$ , find $∠ D$ .

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Solution

$∠ E + ∠ F + ∠ D = 180 °$
$\Rightarrow ∠ D = 180 - 105 - 40$
$= 35 ° .$
Hence, the answer is $35 ° .$

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