Radius & Diameter
Circumference
Area
Working Backwards
Composite figures
100
The distance from the center of a circle to any point of the circle.
What is the radius?
100
Perimeter of a circle.
What is circumference?
100
The formula for the area of a circle?
What is A= π•r2?
100
A bicycle wheel has a radius of 1 foot. If the bicycle wheel rotates one time, how far will the bike go?
What is 6.28 feet?
100
How do you find the area of a triangle.
1/2 bh
200
The distance across a circle measured through its center.
What is the diameter?
200
A circle has a diameter of 3 inches. This is the circumference. Use π = 3.14.
What is 9.42 inches?
200
A circle has a diameter of 16 units. Find the area.
What is 64 pi or 200.96 units2
200
The circumference of a wheel is 8pi, what is the diameter?
what is 8?
200
Find the area of the semicircle and the rectangle
9pi + 12 or 28.26 + 12 = 40.26
300
The radius is 4 inches. What is the diameter?
What is 8 inches?
300
A circle has a diameter of 102.38 inches. What is the circumference?
What is 321.47 inches? 102.38pi
300
A circle has a radius of 50 miles. What is the area of the circle TO THE NEAREST MILE?
What is 2500pi or 7854 mi2.
300
Given circumference 72pi m. The diameter is?
72
300
Find the area of the unshaded shapes. (dia is 4yd) 
Sum is 28.64 or 4pi + 16
400
The Diameter is 25 meters. What is the Radius?
What is 12.5 meters?
400
A circle has a radius of 16 feet. Find the Circumference.
100.48 feet or 32 pi
400
A pizza is 16 inches wide (diameter). It is cut into 4 pieces. Jane eats 3 of the pieces. What is the area of pizza she eats
What is 48 pi in2?
400
John owns a circular pool in his backyard. If he swims around the pool, he swims 30pi meters. What is the radius of this circle?
What is 15 meters.
400
The base of the triangle is 8 and the height is 2.Find the area.
8
500
The diameter is 9 cm. What is the radius
What is 4.5 cm?
500
If the radius is 123.45, the diameter is
What is 246.90
500
If the diameter is 14 cm, the area of the circle is
What is 49pi cm2?
500
A circle has a circumference of 14pi
.
what is the radius?
What is 7?
500
Find the area of the semicircle
24 1/2 pi
24.5 pi