Q.7 Can two angles be supplementary if both of them are:
(i) acute?
(ii) obtuse?
(iii) right?

(i) No, If two angles are acute, means less than 90°, the two angles cannot be supplementary. Because, their sum will be always less than 180° .
(ii) No. If two angles are obtuse, means more than 90°, the two angles cannot be supplementary. Because, their sum will be always more than 180°.
(iii) Yes. If two angles are right, means both measures 90°, then two angles can form a supplementary pair.
90° + 90° = 180°