# If each angle of 90° is to be bisected then the measure of each  angle is

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If each angle of 90° is to be bisected then the measure of each  angle is

A) 60°

B) 70°

C) 80°

D) 45°

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Correct option is (D) 45°

If an angle of $90^\circ$ is to be bisected.

Then each obtained angles $=\frac{90^\circ}2=45^\circ.$

Alternative :- Let angles x & y are angles which is obtained by bisecting an angle of $90^\circ.$

$\therefore$ x = y and x+y = $90^\circ.$  $(\because$ Both angles obtained by bisecting an angle of $90^\circ)$

$\Rightarrow$ 2x = 2y = $90^\circ$

$\Rightarrow$ $x=y=$ $\frac{90^\circ}2=45^\circ$

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Correct option is  D) 45°