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Ex 5.4, 7 Fill in the blanks with acute, obtuse, right or straight : (d) When the sum of the measures of two angles is that of a right angle, then each one of them is ______. Suppose two angles are ∠ A & ∠B Now , Sum of angles = 90° ∠A + ∠B = 90° So , ∠A < 90° & ∠B < 90° ∴ ∠A & ∠B are acute.

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Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.