Answer:
Measure of one angle is required.
Step-by-step explanation:
Kindly refer to the image attached.
AM and BN are the two parallel lines cut by a transversal PQ.
The angles formed are:
.
Let, only one of the angles is known to us.
Let, it is given that
AM is a straight line, therefore
and are vertically opposite angles, therefore must be equal to each other.
and are vertically opposite angles, therefore must be equal to each other.
<em>By Corresponding angle postulate</em>, we can see the following:
Therefore, by knowing just <em>one angle, </em>all the angles can be found.