Question

3. The angles formed on both sides of a common arm and a common vertex are
adjacent angles.
4. A pair of complementary angles or a pair of supplementary angles need not be
adjacent angles.
5. A pair of angles that are adjacent and supplementary form a linear pair.
6.(1) When two lines intersect each other at a point (vertex), the angles formed
opposite to each other are called vertically opposite angles.
(ii) A pair of vertically opposite angles are always equal in measure
7.(1) A line which intersects two or more lines at distinct points is called a transversal
to the lines.
(ii) A transversal makes eight angles with two lines as shown in the adjacent figure.​

Answer 1

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3.Adjacent angles are angles that has a common arm and a common vertex. The angles that are formed side by side is also called as the adjacent angles. The adjacent angles will have the common side and the common vertex. These angles will never overlap each other.

4.Supplementary angles are two angles whose sum is 180 degrees while complementary angles are two angles whose sum is 90 degrees. Supplementary and complementary angles do not have to be adjacent (sharing a vertex and side, or next to), but they can be.

5.A Linear Pair is two adjacent angles whose non-common sides form opposite rays. ∠1 and ∠2 form a linear pair. The line through points A, B and C is a straight line. ∠1 and ∠2 are supplementary.

6.When two lines intersect each other, then the opposite angles, formed due to intersection are called vertical angles or vertically opposite angles. A pair of vertically opposite angles are always equal to each other.

7.i)Transversal

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