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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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Answer» 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 = \(90^\circ\) \(\Rightarrow\) \(x=y=\) \(\frac{90^\circ}2=45^\circ\) Correct option is D) 45° |
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