Angle and Its Types

Q.

Two angles are a linear pair. Their measures are represented by x + 30 and 3x - 10 respectively. What are the measures of the angles?

1. 70${}^{\circ }$ and 110${}^{\circ }$

2. 60${}^{\circ }$ and 120${}^{\circ }$

3. 50${}^{\circ }$ and 130${}^{\circ }$

4. 40${}^{\circ }$ and 140${}^{\circ }$

Q.

Assertion : If the sum of two adjacent angles is $180°$ then the non-common arms of the angles form a line.
Reason : If a ray stands on a line, then the sum of two adjacent angles so formed is $180°$ of these statements:
Which of the following is correct:

1. Both A and R are true and R is the correct explanation of A.

2. Both A and R are true and R is not the correct explanation of A.

3. A is true and R is false.

4. A is false and R is true.

Q.

Each linear pair of angles is

1. (a) complementary

2. (b) parallel

3. (c) supplementary

Q.

Check the given angles are complementary angles or supplementary angles:

$81°,9°$.

Q.

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

1. $29°$

2. $61°$

3. $122°$

4. $119°$

Q.

Choose the correct word and fill in the blanks :

……………. angles are two angles whose measure add to $90°$. (complementary / supplementary)

Q.

Let’s examine which pair of angles are complementary or supplementary to each other :
45°, 45°; 120°, 30°;70°, 110°; 42°, 48°; 37°, 43°; 85°, 95°;

Q.

Check the given angles are complementary angles or supplementary angles:

$30°,60°$.

Q.

Check the given angles are complementary angles or supplementary angles:

$45°,45°$.

Q. If the sum of three equal angles is 180° , then each angle will be _____.

1. 30°
2. 60°
3. 120°
4. 90°

Q.

Identify the angle marked in red.

1. Acute angle
2. Obtuse angle
3. Reflex angle
4. Right angle