NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 5: Lines And Angles

Multiple Choice Questions

The angles between North and West and South and East are

Angles between South and West and South and East are

In Fig. 5.9, PQ is a mirror, AB is the incident ray and BC is the reflected ray. If \(\angle ABC = 46^\circ\), then \(\angle ABP\) is equal to

If the complement of an angle is 79°, then the angle will be of

Angles which are both supplementary and vertically opposite are

The angle which makes a linear pair with an angle of 61° is of

The angles \(x\) and \(90^\circ - x\) are

The angles \(x - 10^\circ\) and \(190^\circ - x\) are

In Fig. 5.10, the value of x is

In Fig. 5.11, if AB ∥ CD, ∠APQ = 50° and ∠PRD = 130°, then ∠QPR is

In Fig. 5.12, lines l and m intersect. Which is false?

If angle P and Q are supplementary and ∠P = 60°, then ∠Q is

In Fig. 5.13, POR is a line. The value of a is

In Fig. 5.14, POQ is a line. If x = 30°, then ∠QOR is

The measure of an angle which is four times its supplement is

In Fig. 5.15, the value of y is

In Fig. 5.16, PA ∥ BC ∥ DT and AB ∥ DC. Then, the values of a and b are respectively

The difference of two complementary angles is 30°. Then, the angles are

In Fig. 5.17, PQ ∥ SR and SP ∥ RQ. Then, angles a and b are respectively

In Fig. 5.18, a and b are

If two supplementary angles are in the ratio 1:2, then the bigger angle is

In Fig. 5.19, ∠ROS is a right angle and ∠POR and ∠QOS are in the ratio 1:5. Then, ∠QOS measures

Statements:

a: If two lines intersect, then vertically opposite angles are equal.

b: If a transversal intersects two other lines, then the sum of two interior angles on same side = 180°.

For Fig. 5.20:

p: a and b form a linear pair.

q: a and b form adjacent angles.

In Fig. 5.21, ∠AOC and ∠BOC form a pair of

In Fig. 5.22, the value of a is

In Fig. 5.23, if QP ∥ SR, the value of a is

In which of the following figures, a and b form adjacent angles?

In a pair of adjacent angles: (i) vertex common, (ii) one arm common, (iii) uncommon arms opposite rays. Then

In Fig. 5.25, lines PQ and ST intersect at O. If ∠POR = 90° and x:y = 3:2, then z = ?

In Fig. 5.26, POQ is a line, then a is equal to

Vertically opposite angles are always

In Fig. 5.27, a = 40°. The value of b is

If an angle is 60° less than two times of its supplement, then the greater angle is

In Fig. 5.28, PQ ∥ RS. If ∠1 = (2a + b)° and ∠6 = (3a − b)°, then the measure of ∠2 in terms of b is

In Fig. 5.29, PQ ∥ RS and a : b = 3 : 2. Then f is equal to

In Fig. 5.30, line l intersects two parallel lines PQ and RS. Then, which one is not true?

In Fig. 5.30, which one is not true?

In Fig. 5.30, which is true?

In Fig. 5.31, PQ ∥ ST. Then, the value of x+y is

In Fig. 5.32, if PQ ∥ RS and QR ∥ TS, then the value a is