Circumference of the Circle

Q. Circumference of a circle of radius 21 cm is

1. 8 cm
2. 88 cm
3. 120 cm
4. 132 cm

Q. Angle formed in minor segment of a circle is

(a) acute

(b) obtuse

(c) right angle

(d) none of these

Q.

The inner circumference of a circular track is$440cm.$ the track is$14cm$ wide. Find the diameter of the outer circle of the track.

Q.

If a diameter of a circle is perpendicular to a chord, then it __________ the chord and its arc.

1. equals

2. bisects

3. circles

4. chords

Q.

If the radius of a circle is halved, its circumference gets

1. tripled

2. halved

3. Remains same

4. doubled

Q.

The boundary of the circle is called as the ___ of the circle.

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.

Three boys, Ankur, Syed and David are sitting at equal distances on the boundary of a circular park of radius $20m.$ Each of them has a toy telephone to talk to each other. Find the length of the string that connects the telephones of any two of the boys. The distance from the centre of the park to the strings is 10m.

1. circumference

2. chord
3. radius
4. tangent

Q.

The length (or boundary or perimeter) of a circle is called its __ .

Q. A chord which doesn't pass through the center of circle divides a circle into two .

1. segments
2. sectors
3. halves

Q.

The length of the line that marks out a circle and its region is the

1. Radius

2. Chord

3. Diameter

4. Circumference

Q.

How many times a wheel of radius $28cm$ must rotate to go $352m$? (Take $\pi =\frac{22}{7}$)

Q.

The circumference of the circle is equal to:

1. πr

2. 2πr

3. 4πr

4. 8πr

Q. 48. The radius of a circle is 30cm. Find the lenght of an arc of this circle if the lenght of the chord of the arc is 30cm(triangle formed by the chord and the radius at its end points will be equilateral.)

Q.

A sprinter starts from the point A and runs on the circular track completing one complete round. Which of the following is equal to the distance covered in one round?

1. Radius of the circle

2. Segment of the circle

3. Circumference of the circle

4. Diameter of the circle

Q.

A circular park of radius 20 m is situated in a colony. Three boys Ankur, Syed and David are sitting at equal distance on its boundary each having a toy telephone in his hand to talk each other. Find the length of the string of each phone.

1. 30√3

2. 10√3

3. 40√3

4. 20√3

Q. A chord which doesn't pass through the center of circle divides a circle into two .

1. segments
2. sectors
3. halves

Q.

In the given figure, AB is the side of a regular octagon and BC is the side of a regular hexagon. Find $\angle$AOC.

Q. 40. A circle of radius 2 cm is divided in to two segment by a chord of length 2cm, than the angle subtended by the chord at a point in major segment is

Q. How to find circumference of circle.

Q.

The line drawn through the centre of a circle to bisect a chord is __ to the chord.

Q.

The length of the curve given in red is given by :

1. Radius

2. Circumference

3. Center

4. None of these

Q. How we can find the radius of the circle?

Q.

In the given figure AB is the side of a regular octagon and BC is the side of a regular hexagon. Find $\angle$ AOC.

1. ${100}^o$

2. ${115}^o$

3. ${95}^o$

4. ${105}^o$

Q. A chord which doesn't pass through the center of circle divides a circle into two .

1. segments
2. halves
3. sectors

Q.

The circumference of a circle is 44 cm. What is its area?

1. 168 sq cm

2. 145 sq cm

3. 1.54 sq m

4. 154 sq cm

Q. The radius of a circle whose circumference is the sum of that of two circles with radii 36 and 20 units is __.

1. 65 units
2. 56 units
3. 34 units
4. 46 units

Q.

In the given figure AB is the side of a regular octagon and BC is the side of a regular hexagon. Find $\angle$ AOC.

Q.

Which of the following denotes the length of the curve in red in the given circle?

1. Centre

2. Circumference

3. Radius

4. Segment

Q. A circular park of radius $20m$ is situated in a colony. Three boys Ankur, Syed and David are sitting at equal distance on its boundary each having a toy telephone in his hands to talk to each other. Find the length of the string of each phone.