Complementary Angle

Q. Two angles are said to be complementary, if their sum is ${90}^{\circ }$.

1. False
2. True

Q. Which of the following pair of angles are complementary angles ?

1. ${30}^o\text{and}{60}^o$
2. ${45}^o\text{and}{45}^o$
3. $1^o\text{and}{89}^o$
4. ${12}^o\text{and}{78}^o$

Q. Line $l$ is perpendicular to line $m$. What are the values of $x$ and $y$ ?

1. $x={20}^o\text{and}y={35}^o$
2. $x={25}^o\text{and}y={30}^o$
3. $x={15}^o\text{and}y={40}^o$
4. $x={10}^o\text{and}y={45}^o$

Q.

If sum of measures of two angles is $90°$, then the angles are ____.

Q.

In complementary angles, the sum of their measure is:

1. $90°$

2. $270°$

3. $360°$

Q. The sum of two complementary angles is equal to -

1. ${90}^o$
2. Right angle
3. More than ${90}^o$
4. Less than ${90}^o$

Q.

Choose the correct pair of complementary angles.

1. ${30}^{\circ }$
2. ${15}^{\circ }$
3. ${20}^{\circ }$
4. ${60}^{\circ }$
5. ${45}^{\circ }$
6. ${36}^{\circ }$
7. ${75}^{\circ }$
8. ${70}^{\circ }$
9. ${45}^{\circ }$
10. ${54}^{\circ }$

Q. Indicate which pairs of angles are:
(i) Vertically opposite angles
(ii) Linear pairs

(2 marks)

Q. The complementary angle of 37.4° isdegrees.

Q. In the following figure, angle $x\text{and}y$ are

1. Complementary angles
2. Acute angles
3. Adjacent angles
4. Supplementary angles

Q.
If $\angle AOB={35}^{\circ }$ and $\angle PQR$ are complementary, then $\angle PQR=$.

1. ${60}^{\circ }$
2. ${90}^{\circ }$
3. ${55}^{\circ }$