Introduction to Circles

Q. Choose the incorrect statement.

1. A sector is the area enclosed by two radii and a chord.

2. A circle divides the plane on which it lies into three parts.

3. The mid point of any diameter of a circle is the centre.

4. The area enclosed by a chord and the major arc is major segment.

Q.

If AB is a chord which passes through the centre O of a circle, then what is AB known as?

1. Diameter of the circle

2. Radius of the circle

3. Sector of the circle

4. Segment of the circle

Q.

Find the circumference of the circle from the figure.
(Use $\pi =\frac{22}{7}$)

1. 88 cm

2. 120 cm

3. 132 cm

4. 8 cm

Q.

The perimeter of a circle is called its ____.

1. circumference

2. radius

3. area

4. diameter

Q.

What is the circumference of a circle of radius 7 cm?

1. 198 cm

2. 19.8 cm

3. 22 cm

4. 44 cm

Q.

A sector with a central angle greater than ${180}^{\circ }$ is called a ____ of the circle.

1. major sector

2. minor sector

3. segment
4. chord

Q. A diameter is the longest chord in a circle.

1. False
2. True

Q.

The circumference of a circle of radius $r$ is given by ___.

1. $\pi r$

2. $2\pi r$

3. $4\pi r$

4. $\frac{\pi r}{2}$

Q. The region enclosed between two radii and the corresponding arc in a circle is called a________ of the circle.

1. segment
2. arc
3. sector
4. circumference

Q. A chord divides a circle into 2 segments.

1. True
2. False