Circle

Q. Calculate the circumference of the circle if the diameter is 14 cm.

Q. Diameter of a circle is _______ the radius of the circle.

1. thrice
2. equal to
3. less than
4. twice

Q. A road roller makes 200 rotations covering 2200 m. Find the radius of the roller.

Q.

Find the radius of the button.

Q.

What is the shape of the meridians?

Q. The radius of a circular cricket ground is 76 m. A drainage 2 m wide has to be constructed around the cricket ground for the purpose of draining the rain water. Find the cost of constructing the drainage at the rate of ₹ 130/- per sq.m.
[3 marks]

Q.

A slice of pizza is a ___.

1. Segment

2. Sector

3. Triangle

4. Square

Q.

If the diameter of the wheel is $0.5$ meters, then the radius of the wheel is how many centimeters?

Q. The diameter of a circle is 7cm, then the radius of the circle is .

1. 7cm
2. 3.5cm
3. 14cm
4. 4.5cm

Q. What is the perimeter of a semi-circle?
(2 marks)

Q.

The Perimeter of a circle is also known as the?

Q. The shortest of the two arcs between two points on a circle is called a MINOR arc.

1. True
2. False

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. 46 units
4. 34 units

Q.

What is used to construct circles?

1. compass

2. ruler

3. divider

4. calculator

Q.

Tom went out to eat a pizza. What shape most accurately describes a pizza? ___

Q. Zain draws a line segment AB. Then, taking A as the center and AB as the radius, he draws a semicircle above AB. Taking the same radius and B as the center, he draws a curve that intersects the semicircle. From the point of intersection, with the same radius, he draws a curve that intersects the semicircle at another place and marks it as C. What is the angle formed by ABC?

Q.

What is the circumference of circle?

Q. Arrange the following circles in the ascending order of their circumferences.

Q. The diameter of a circle is 7cm, then the radius of the circle is .

1. 7cm
2. 3.5cm
3. 14cm
4. 4.5cm

Q. The expression of the division $\frac{\frac{1}{3}}{\frac{3}{4}}$ equals ____

1. $\frac{1}{4}$
2. $\frac{4}{5}$
3. $\frac{4}{9}$
4. $\frac{1}{3}$

Q. When we draw a circle, the point where we pin the compass becomes the of the circle.

1. centre
2. radius
3. diameter

Q. Fill in the blanks

1. Three
2. Two
3. one
4. four

Q. The ratio of the radii of two circles is 3 : 2. What is the ratio of their circumference?

Q.

4 focus lights are to be fixed on a square aluminium plate of side 28 inches. Circles are cut in the plate to accommodate the lights. After the required alterations, the aluminium plate looks similar to the figure shown below. What is the area of the aluminium portion after alterations?

1. 120 sq inches

2. 168 sq inches

3. 160 sq inches

4. 148 sq inches

Q. The ratio of the radii of two circles is 3 : 2. What is the ratio of their circumference?