Radius & Diameter
Circumference
Area
Working Backwards
Composite figures
100
What is Radius?
Radius is the distance from the centre of a circle to any point of the circle.
100
What is Circumference?
Circumference is the distance around a circle.
100
What is the formula for area of a circle?
A= pi*r2
100
A bicycle wheel has a radius of 1 foot. If the bicycle wheel rotates one time, what distance is travelled?
What is 2pi or 6.28 feet.
100
When finding a composite shape, you need to find the area of all the shapes and do what operation?
What is add?
200
What is Diameter?
The distance across a circle measured through its centre.
200
A circle has a diameter of 3 inches. This is the circumference.
What is 9.42?
200
A circle has a diameter of 16 inches. Find the area. You can use a calculator
200.96 in2
200
The circumference of a wheel is 113.04 inches. What is the radius of the wheel? You can use a calculator.
What is 18 inches?
200
What is the formula for finding the area of a triangle?
1/2 base * height
300
If the distance from the midpoint to the outer edge of a circular pool is 21.5 feet, how far do you need to swim to get from one side of the pool to the other?
43 feet
300
A circle has a diameter of 102.38 inches. What is the circumference? Round to the nearest hundredth
What is 321.47 inches?
300
A circle has a radius of 50 miles. What is the area of the circle TO THE NEAREST MILE? You can use a calculator.
What is 7854 mi2.
300
If your circumference is 72.98 what is your radius?
What is 11.62?
300
A figure is composed of a rectangle and a semi-circle. The base of the rectangle is 8 inches and the height is 4 inches. The radius of the semi-circle is 6. Find the area. calculator available.
What is 145.04 in2?
400
The Diameter of an igloo is 25 meters. What is the Radius?
The Radius is 12.5 meters.
400
A circle has a radius of 16 feet. Find the Circumference.
100.48 feet
400
A pizza is 16 inches long (diameter). It is cut into 4 pieces. Jane eats 3 of the pieces. What is the area of pizza she is eating? You can use a calculator
What is 48 pi in2
400
John owns a circular pool in his back yard. If he swims around the pool, he swims 30pi meters. What is the radius of this circle?
What is 15 meters.
400
Find the shaded area. Round:nearest whole number
157 cm2
500
The Radius of a circular stool seat is 81.75 cm. What is the Diameter?
the Diameter is 163.5 cm.
500
If the radius is 123.45, this is the circumference. You can use a calculator.
What is 775.266?
500
If the diameter of a circular arena is 73.5 meters. What is the area, rounded to the nearest tenth? Use a calculator
What is 4240.8 meters2?
500
A circle has a circumference of 18.84
.
What is the area?
What is 28.26
500
Find the area to the nearest hundredth.
895.17 in2