Diameter

Q.

What is a line segment passing through the center of the circle and having its end points on the circle called?

1. Shortest chord

2. Radius

3. Circumference

4. Diameter

Q.

The radius of a circle is 3.5 cm. Its diameter will be ___.

1. 8cm
2. 9cm
3. 7cm
4. 5cm

Q.

The ____ divides the circle into two equal parts.

1. Circle

2. Circumference

3. Radius

4. Diameter

Q.

Find the diameter of a circle of radius 14 cm.

1. 7 cm
2. 28 cm
3. 14 cm
4. 8 cm

Q.

What will be the diameter of a circle of radius 18 cm?

1. 36 cm
2. 18 cm
3. 9 cm
4. 6 cm

Q. If the radius of the circle is 2 cm, then its diameter is .

1. 2 cm
2. 4 cm
3. 6 cm

Q.

Find the diameter of a circle of radius 48 cm.

1. 100 cm
2. 95 cm
3. 98 cm
4. 96 cm

Q.

If a chord divides a circle into two equal halves, the chord is called ___.

1. Radius

2. Diameter

3. Secant

4. Tangent

Q. If the diameter of the circle is 8 cm then its radius is .

1. 16 cm
2. 8 cm
3. 4 cm

Q.

If diameter of a circle is doubled, then

1. Radius will be doubled
2. Radius will decrease
3. Radius will be halved
4. Radius will remain same

Q.

What will be the diameter of a circle whose radius is 15 cm?

1. 30 cm

2. 15 cm

3. 5 cm

4. 45 cm

Q. Choose the radii of the following circle.

Given O is the centre of the circle.

1. AB
2. OB
3. AP
4. OP

Q. O is the centre of the given circle. Which of the lines OA, OB, OC, OD, BD and BA are radii (Plural of radius) and why?

Q.

The diameter of a circle passes through the ____ of a circle.

1. Point

2. Chord

3. Circumference

4. Center

Q.

Diameter is the ____ of a circle.

1. Longest

2. Shortest

3. Radius

4. Circumference

Q. Every chord of a circle is a diameter. Please comment whether this is true or not

Q.

If the radius of a circle is a multiple of 3, then the diameter will be a multiple of

1. 3
2. both 3 and 6
3. 6
4. None

Q.

The radius and the diameter of the given circle are ___ and ___respectively.

1. AB, OB

2. OA, AB

3. AB, BA

4. OA, OB

Q.

The difference between the radii of two circles is 4cm. The difference between their diameters is ___.

1. 2cm
2. 4cm
3. 8cm
4. 6cm

Q.

The longest chord a circle is ____.

1. Diameter

2. Radius

3. Point

4. Circumference

Q.

The radius of a circle is 5cm. Which of the following cannot be a chord of the circle?

1. 12
2. 6
3. 8
4. 4

Q.

If the radius of a circle is 8 cm then its diameter is ___.

1. 4 cm

2. 16 cm

3. 12 cm

4. 10 cm

Q.

In the given figure, the chords of the circle with center O are

1. OB, CB

2. AB, OA

3. OD, CD

4. BC, AD

Q.

Difference between the diameters of two circles is 6cm. The difference between their radii is ____.

1. 6cm
2. 3cm
3. 4cm
4. 9cm

Q.

In the given figure, $\angle ABC=45°$, then

1. $OA<OC$

2. $OA\perp AB$

3. $OA=AB$

4. $OA\perp OC$

Q.

There is no difference between circle and circumference.

1. True
2. False

Q.

The figure is of a circle with its center at O. The line PQ is the:

1. Diameter of the circle

2. Radius of the circle

3. Chord of the circle

4. Tangent of the circle

Q.

The longest chord of a circle is a _____________ of the circle.

Q. Observe the given figure and fill in the blanks.

1. P is the ______ of the circle.
2. PO and PQ are two _______ of the circle.
3. OQ is the ___________ of the circle.
4. The length of radius PO = ________ cm.
5. The length of radius PQ = ________ cm.
6. The length of the diameter = lengths of radii [PO + PQ]
   = 3.5 cm + 3.5 cm = _______ cm
7. If the radius of the circle is $5cm$, what will its diameter be? _________
8. If the diameter of the circle is $6cm$, what will its radius be? ______

Q. Draw the radius of this bangle using a ruler. Measure the length of the radius.