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Circle Terms
Circumference of a Circle
Area of a Circle
Radius/Diameter
Word Problems
100
The distance from the centre of the circle to the outside edge.
What is radius (r)?
100
When the diameter of a circle is 5m, the circumference is ______? (to the nearest tenth of a unit)
What is 15.7m?
100
What is the formula for area of a circle?
What is A= r² x π?
100

If the diameter is 24 cm, what is the radius?

12 cm

100
Mehreen has two cookies. The chocolate chip cookie has a radius of 15cm the monster cookie has a diameter of 25 cm. The bigger cookie is the _______.
What is the chocolate chip cookie?
200
The distance across a circle through its centre.
What is diameter (d)?
200
The radius of the circle is 9mm, the circumference of the circle is ____? (to the nearest tenth of a unit)
What is 56.5mm?
200
When r = 4.3cm, the area of the circle is ____. (To the nearest tenth of a unit)
What is 58.1 cm²?
200
If the radius is 10.8 cm what is the diameter?

21.6 cm

200
When the spoke of a bicycle tire is 0.5 meters, the circumference of the bicycle tire is ___. Round to the nearest hundredth.
What is 3.14m?
300
The ratio of the circumference of a circle to its diameter. (C ÷ d)
What is pi? (π)
300
d=27m find the circumference (to the nearest tenth of a unit)
What is 84.8 m?
300
When r=1.2m, the area of the circle is ____? (To the nearest hundredth of a unit)
What is 4.5m²?
300

What is a diameter?

A line from one edge to the other through the center.

300
The length from the point of a pizza slice to the outside of the crust is 15 cm. What is the area of the whole pizza. Round to the nearest tenth of a unit.
What is 706.5 cm²?
400
The measure found using the formula d x 3.14.
What is circumference (C)?
400
The circumference of a circle is 221mm, what is the diameter? (to the nearest hundredth of a unit)
What is 70.38mm?
400
When the diameter of a circle is 5.45km, the area of the circle is ____. (To the nearest hundredth of a unit)
What is 23.32 km²?
400

What is a line not through the center?

chord

400
Dylan is running in the school track meet. The radius of the circular track is 20 meters. If the meet requires the runners to run around the track twice, Dylan will run ____ in total. Round to the nearest whole km.
What is 126km?
500
The number of squared units contained in a circle?
What is area (A)?
500
When the circumference of a circle is 157cm, what is the radius?
What is 25cm?
500
When the radius of a circle is 8mm, the area of the circle is ___. (To the nearest tenth of a unit)
What is 201.0 mm²?
500

Mr. Markel put his sprinkler in the center of his circular yard and it only hit one point on the fence. What circular term would this model?

radius

500
The Canadian toonie has a diameter of 28 mm. The inner ring of the toonie has a diameter of 16mm. The area of the outer ring of the toonie is ____ mm. Round to the neared hundredth of a unit.
What is 414.48mm²?