Question

1.
► m
Choose the correct alternative.
(1) In the adjoining figure, if line m || line n
and line p is a transversal then find x.
(A) 135° (B) 90° (C) 45° (D) 40°
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Answer 1

Answer:

In the given figure 'O' is the common vertex and OB is the common arm. Hence, ∠a and ∠b are called the adjacent angles. Linear Pair: A pair of adjacent angles is called linear pair, if their two non-common arms are opposite rays. Here adjacent ∠A and ∠B are linear pair The angle sum of a linear pair is equal to 180o.