1. What are co - joined angles ?
2. Define : a) Betweenness b) Half - plane c) Vertex of an angle d) Arms of an angle
3. Explain pairs of alternate interior angles .
1.
Co-joined angles: the consecutive angles are known as conjoined angles. in the parallelogram sum of conjoined angles are supplementary.
2.
Half Plane : A half plane is a planar region consisting of all points on one side of straight line, and no points on the other side.
Vertex of an angle: the point about which the angle is measured , is known as vertex of an angle.
Arms of an angle: two straight sides about which angle is measured is called as ams of an angle.
pair of alternate interior angles: when a transversal intersects two parallel lines, pair of angles which are inside the parallel lines and
on the opposite sides of the transversal is known as a pair of alternate interior angles.
(4, 6) and (3,5) are the pair of interior angles.
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