Radius & Diameter
Circumference
Area
Working Backwards
Composite figures
100
The distance from the center of a circle to any point of the circle.
Radius
100
What is the circumference?
Distance around the outside of a circle.
100
What is 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, what distance is traveled?
6.28 feet
100
When finding a composite shape, you need to find the area of all the shapes and _______.
add them together
200
The distance across a circle measured through its center.
Diameter
200
A circle has a diameter of 3 inches. What is the circumference?
9.42 inches
200
A circle has a diameter of 16 units. Find the area.
200.96 units2
200
The circumference of a wheel is 113.04 inches. What is the diameter?
36 inches
200
Find the area to the nearest tenth.
46.1 m2
300
The radius is 4 inches. What is the diameter?
8 inches
300
A circle has a diameter of 102.38 inches. What is the circumference?
321.47 inches
300
A circle has a radius of 50 miles. What is the area of the circle TO THE NEAREST MILE?
7854 mi2.
300
If your circumference is 36.424 m. What is the radius?
5.8 m
300
Find the shaded area. Give the approximate answer.
53.7 yd2
400
The Diameter is 25 meters. What is the Radius?
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?
150.72 in2
400
John owns a circular pool in his backyard. If he swims around the pool, he swims 94.2 meters. What is the radius of this circle?
15 meters
400
A figure is composed of a triangle and a semi-circle. The base of the triangle is 8 and the height is 4. The radius of the semi-circle is 6. Find the area.
25.42 un
500
The Radius is 81 cm. What is the Diameter?
162 cm
500
If the radius is 123.45, this is the circumference?
775.266 un
500
If the diameter is 14 cm, the area of the circle?
153.86 cm2
500
A circle has a circumference of 18.84. What is the area?
28.26 units
500
Find the area. Give the approximate answer.
122.1 cm2