Radii, Chord, Diameter and Circumference of the Circle

Q. If the circumference of a pan pizza is 88 cm, then find the length of the straight sides of the pizza slice if the pizza is cut into four equal pieces? (Take $\pi =\frac{22}{7}$)
(3 marks)

Q.

There was a race held in your school and you wanted to watch the race and went to the ground. Three people started from A, B and C and stopped at the end point. Since the starting point is different for all, you felt that the game is not fair.

However, a friend of yours told you that the radius of the track B is more than radius of track A and hence everybody runs the same distance. He then asked you to find out the radius of track B, given that the radius of track A is 14m and distance between B and the end point is 22 m (as given in the figure). What is the radius of track B.

1. 15 m

2. 17.5 m

3. 16 m

4. 16.5 m

Q. The circumference of a circle with a diameter of 2 units is ________.

1. $\pi$ units
2. 2$\pi$ units
3. 8$\pi$ units
4. 4$\pi$ units

Q.

Radius of a circle with centre 'O' is 5 cm. Length of the segment OD = 9 cm. Where does the point D lie?

1. Point D lies outside the circle

2. Point D lies inside the circle.

3. Point D lies on the circle.

4. Point D is the centre of the circle.

Q.

If A and B are two points on the circle, then the line joining A and B is called as the ____.

1. Center

2. Circumference

3. Chord

4. Point

Q. The perimeter of a circle with a diameter = '14 cm' is equal to 88 cm.

1. True
2. False

Q.

A car has to travel 0.121 km to reach from A to B. If the radius of the tyre is 7 cm. How many times will the tyre rotate while the car travels from A to B ? (Use π = $\frac{22}{7}$)

1. 275

2. 250
3. 300
4. 325

Q.

Which of the following is equal to the length of the curve in red in the given circle?

1. Radius

2. Circumference

3. Centre

4. Segment

Q.

If radius of a circle is halved then, ________________.

1. Diameter will be doubled

2. Diameter will be halved

3. Diameter will increase

4. Diameter will be same

Q.

Which of the following is a chord?

1. Diameter
2. Radius
3. Segment
4. Arc