84. What is the type of other angle of a linear pair if
(a) one of its angles is acute?
(b) one of its angles is obtuse?
(c) one of its angles is right?
(a) Obtuse
(b) Acute
(c) Right angle
Linear pair = 180°. If one is acute (<90°), the other is obtuse (>90°). If one is obtuse (>90°), the other is acute (<90°). If one is right (90°), the other is also right (90°).