Radius and Diameter
Formulas
Perimeter of Composite Figures
Area of a Circle
Circumference of a Circle
100
Find the radius of the image. 
10 inches
100
The formula for Area of a Circle
A = 𝝅r2
100
Find the Perimeter of the Composite Figure in image #6.
16 units
100
Find the Area of circle with a diameter of 14 cm.
153.86 cm2
100
Find the Circumference of a circle with a diameter of 12 in.
37.68 in
200
Find the diameter of a circle with radius of 7 meters.
14 meters
200
Formula for Circumference of a Circle when you have the diameter
C = 𝝅d
200
Find the Perimeter of the figure in image #7.
32 units
200
Find the Area of circle with radius of 13 in.
530.66 in2
200
Find the Circumference of image #16 rounded to the nearest tenth.
87.9 in
300
Find the radius of a circle with Area of 153.86 sq. ft.
7 feet
300
Formula for Circumference of a Circle when you have the radius
C = 2𝝅r
300
Find the Perimeter of the figure in image #8.
29.7 feet
300
Find the Circumference of a circle with Area of 706.5 sq. ft.
94.2 ft.
300
Find the perimeter of the semicircular image.
25.7 cm.
400
Find the diameter of image #4.
4 centimeters
400
Formula for Area of a Rectangle (and Square)
A = l x w
400
Find the Perimeter of the figure in image #9.
56 meters
400
Find the Area of a circle with a diameter of 10 rounded to the nearest whole number.
79 units2
400
Find the perimeter of the semicircle with radius of 8.5 ft.
43.69 ft
500
Find the radius of the small circle in image #5.
11 meters
500
How to find the perimeter of a Composite Figure (not a "formula")
Add all of the sides together
500
Find the Perimeter of the figure in image #10.
30.26 yards
500
Find the Area of image #14 if each square has a length of 3 inches.
706.5 in2
500
Image #19 - A coaster has a circumference of 12.56 inches. Suppose the same amount of coaster is visible around the bottom of a glass as shown. What is the circumference of the glass?
9.42 in