Mathematics

Triangle DEF in figure is right triangle with $\angle E=90^{o}$.What type of angles are $\angle D$ and $\angle F$?

They are complementary angles

SOLUTION
$\angle D+\angle E+\angle F=180^{o}$ ....Angle sum property
$\because \angle E=90^{o}$
$\Rightarrow \angle D+\angle F=180^{o}-90^{o}$
$\Rightarrow \angle D+\angle F=90^{o}$
Therefore, angle $D$ and $F$ are complementary angles.

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Single Correct Medium Published on 09th 09, 2020
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