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Circle Terms & Formulas
Finding Circumference
Finding Radius
Finding Diameter
Finding Area
100
The distance from the centre of a circle to the outside, also half of the diameter
What is the radius?
100
The round temperature dial on a thermostat has a diameter of 4 centimetres.
What is 12.56cm?
100
The diameter for this circles is 12m
What is 6m?
100
Ms. Brown found a copper coin. She measured the coin and calculated that it has a circumference of 6.28 centimetres.
What is 2cm?
100
Area of a parallelogram Base = 13cm Height = 24cm
What is 312cm^2?
200
Diameter formula
What is d = c/pi?
200
After stepping into a room with unusual lighting, Ms. Brown's pupil has a diameter of 6 millimetres.
What is 18.84mm?
200
The diameter of this circle is 56mm
What is 28mm?
200
The radius of this circle is 7cm
What is 14cm?
200
What is the area of this triangle Base = 9cm Height = 28cm
What is 126cm^2?
300
Circumference formula
C = (Pi)(d)
300
The diameter for this circle is 34m
What is 106.76m?
300
The diameter of this circle is 1200m
What is 600m?
300
The radius of this circle is 450cm
What is 900cm?
300
Area of a parallelogram Base = 2m Height = 7m
What is 14m^2
400
The distance around a circle, also known as the perimeter
What is circumference
400
The diameter for this circle is 75cm
What is 235.5cm
400
The circumference of this circle is 20cm.
What is 3.18cm?
400
The circumference of this circle is 45m
What is 14.33m?
400
Area of a triangle Base = 11m Height = 20m
What is 110m^2?
500
Area of a triangle formula
A =bh/2 or A=1/2bh
500
The radius for this circle is 3254m
What is 20 435.12m?
500
The circumference of this circle is 1000mm?
What is 159.24mm?
500
The circumference of this circle is 900m
What is 286.62m?
500
Area of a triangle Base = 500cm Height = 2300cm
What is 575 000cm^2