Can two angles be supplementary if both of them are: (i) acute (ii) obtuse (iii) right?

(i) No, because sum of two acute angles is less than 180°.
(ii) No, because sum of two obtuse angles is more than 180°.
(iii) Yes, because sum of two right angles is 180°.

Class 7 Maths Chapter 5 Exercise 5.1

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