NCERT Solutions for Chapter: Lines and Angles, Exercise 1: Exercise

In the figure given below, $AD$ is a straight line. $PS$ and $QR$ are perpendicular to $AD. GH$ is parallel to $IJ$ and $KL$ is parallel to $MN.$

Which of the following is true for $DE$ and $DF$?

A diagram of a see-saw is given below.

State all the pairs of vertically opposite angles in the given figure.

A diagram of a see-saw is given below.

Which of the following is a pair of alternate exterior angles?

Three lines shown in the figure intersect each other at point $P$.

Line$l$ is perpendicular to line $n$. The measure of $\angle 2$ is $65°$.

What is the measure of $\angle 6$?

Three lines shown in the figure intersect each other at point $P$.

Line $l$ is perpendicular to line $n$. The measure of $\angle 2$ is $65°$.

What is the sum of the measure of $\angle 3$ and $\angle 4$?

If the supplementary angle is $2\frac{2}{7}$ times of its complementary angle of an angle. Find the measure of the given angle ?

Two complementary angles are in the ratio $2:3$. Find the larger angle between them.

An angle is thrice its supplement. Find it.