All About Circles | Baamboozle - Baamboozle | The Most Fun Classroom Games!

English 17 Public

Radius, Diameter, Circumference & Area of a Circle

Study Slideshow

I am a part of the circle that looks like a slice of cake or a slice of pizza. I am called a ___________.

Sector

15

I am a straight line that goes from one side of the circle to the other through the centre point. What am I called?

Diameter

15

I am equal to half of the diameter. I am a line that joins the centre point to the circumference. What am I called?

Radius

10

What is the diameter of the circle shown?

8m

15

What are the values that we usually use for pi? (State the 2 of them)

3.14 and 22/7

15

What is the distance around the circle?

Circumference

15

If the diameter of the circle is 8cm, what is its area? Take π= 3.14

50.24 cm2

15

What is the formula for area of a circle?

π x radius x radius

10

A round jar lid has a radius of 3 centimeters. What is the lid's area? Take π = 3.14

28.26cm2

10

Find the area of the semicircle. Take π = 3.14

56.52 cm2

15

The dirt on a baseball field is in the shape of a quarter circle. If the radius of the quarter circle is 10 meters, how much area does the dirt cover? Take π= 3.14

78.5 m2

15

If a circle has a radius of 8 centimeters, approximately what is its circumference? Use 3.14 for pi

50.24 cm

15

Which circle has a greater circumference, (OPTION 1) a circle with a diameter of 10 or (OPTION 2) a circle with a radius of 6?

Option 2

15

Pi is equal to the ratio of the ____________ of a circle divided by its ____________.

Circumference, diameter

15

A car has a wheel with a diameter of 90cm. If it makes 10 rotations, how far will it travel? Take π= 3.14

2826cm

15

The radius of a quadrant is 7 cm. What is the perimeter of the quadrant? (Take π = 22/7)

25 cm

20