Converse of Theorem 5

Q.

In the given figure, $\widehat{AB}=\widehat{CD},\angle AOB={55}^{\circ }$ and $\angle BOC={70}^{\circ }$.

Find the value of $\angle COD$

1. ${50}^{\circ }$

2. ${70}^{\circ }$

3. ${55}^{\circ }$

4. ${65}^{\circ }$

Q. In the given figure arc AB and arc CD of a circle having centre at O are equal to 5cm.If $\angle AOB={40}^{\circ }$, then the $\angle COD$ is equal to__.

1. ${30}^{\circ }$
2. ${40}^{\circ }$
3. ${50}^{\circ }$
4. ${60}^{\circ }$

Q. In the given figure arc AB and arc CD of a circle having centre at O are equal to 5cm.If $\angle AOB={30}^{\circ }$, then the $\angle COD$ is equal to__.

1. ${75}^{\circ }$
2. ${30}^{\circ }$
3. ${45}^{\circ }$
4. ${60}^{\circ }$

Q. If PQ = RS and $\angle ORS={48}^{\circ }$ in the given figure, what are the values of $\angle OPQ$ and $\angle SOR$?

1. ${48}^{\circ }$, ${84}^{\circ }$
2. ${84}^{\circ }$, ${48}^{\circ }$
3. ${78}^{\circ }$, ${84}^{\circ }$
4. ${38}^{\circ }$, ${68}^{\circ }$

Q. What is the angle subtended by the major arc of a circle?

1. >180 degrees
2. <180 degrees
3. 180 degrees
4. >360 degrees

Q. Unwinding of silk threads from cocoon is called reeling.

1. False
2. True

Q. Arrange the given processes involved in the processing of wool in the correct order.

1. Carding
2. Scouring
3. Spinning
4. Shearing
5. Combing

Q. Name the natural fibre used in the production of following items.

1. 
2. 
3. 
4. 

Q. Water droplets on a cold water bottle are the condensed form of water vapour in air.

1. True
2. False