Circle Vocab
Finding Circumference
Finding Area
Word Problems
100
The distance from the center of a circle to the outside, also half of the diameter
radius
100
A circular garden has a radius of 21 m. The owner wants to put a plastic edge around the garden, so wants to know what is the circumference of the garden? Use (22/7) as an approximation for π
132 m
100
A circular table has diameter 1.4 m. What is the area of the top of the table? Use (22/7) as an approximation for π
1.54 in2
100
The circumference of a circular park is 176 m. Find the radius of the park.
28 m
200
The longest chord in a circle
Diameter
200
If the circumference of the circle is 50.24 cm. What is the radius? round to the nearest whole number
8 cm
200
The diagram shows a logo design consisting of two circles joined together. The top circle has radius 3 units and center O. If the total area of the logo is
What is the radius of Circle P?
5 units
200
The diameter of a circular park is 98 m. Find the cost of fencing it at $4 per meter.
$1232
300
A line through the circle.
chord
300
The diagram shows a semicircular carpet with a diameter 7 ft. What is the circumference of the carpet? Use (22/7) as an approximation for π
18 ft
300
The diagram shows a circle with center O and radius 42 inches.
A and B are points on the circumference such that arc AB makes an angle of 120° at O. Calculate the area of the sector AOB. Use 22/7 as an approximation for π
1848 in2
300
The tire of a car has a radius of 10.5 inches. How many revolutions does the tire need to make for the car to travel 13,200 inches? Use 22/7 as an approximation for π.
200 revolutions
400
The total amount of space inside of a circle
area
400
A piece of metal has a shape made of a square and a semicircle:
What is the perimeter of the shape? Use (22/7) as an approximation for π
32
400
This is a shape made up of four quarter-circular arcs, each of radius 5 inches, joined together:
What is the area of the shape? Use 3.14 as an approximation for π
21.5 in
400
A Japanese fan is made out of wood and cloth. The shape of the fan is made
up of two overlapping quadrants. What is the area of the portion that is made
of cloth? Use 22/7 as an approximation for π
462 m2
500
The diagram shows a circle with center O and radius 42 inches. A and B are points on the circumference such that arc AB makes an angle of 120°. Calculate the length of the minor arc AB!
Use 22/7 as an approximation for π
88 inches
500
The shape is a square with two-quarter circles cut from opposite corners. What is the perimeter of the shape?
Use 22/7 as an approximation for π
86 cm
500
If the ratio of the radii of two circles is 3:4, then what is the ratio of their areas?
A1 : A2 = 9/16
500
A silver wire when bent in the form of a square encloses an area of 121 sq. cm. If the same wire is bent in the form of a circle. Find the area of the circle.
154 cm2