The radius, diameter, circumference, and area of a circle
Geometry : 2/9/12 : Name:------------------- Pd:------
Practice worksheet on the radius, diameter, circumference, and area of a circle
Formulas: 1) Circumference C = [pic] or C= [pic]
2) Diameter, d = 2r and radius , [pic]
3) Area of a circle , A = π r2
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1) . The radius of a circle is 5 inches. What is the
(a) diameter (b) circumference
(c) area
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2) The diameter of a circular rug is 5.6 feet. a) What is the radius? b) Circumference? c) Radius?
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3) ) The diameter of your bicycle wheel is 34 inches. What is it’s radius? How far will you move in one turn of your wheel? What is the distance covered in 5 turns of the wheel?
4) Find the following ( use [pic] )
a) The circumference of a circle with a diameter of 15 cm.
b) The radius of a circle with a diameter of 480 in.
c) The circumference of a circle with a radius of 320 cm.
d) The diameter of a circle with a radius of 522 ft.
The radius, diameter, or circumference of a circle is given. Find the missing measures. Show your work
| |Radius |Diameter |circumference |Area |
| |10inch | | | |
| | | | | |
| | | | | |
| | | | | |
| | |10 | | |
| | | | | |
| | | | | |
| | | | | |
| | | | | |
| | | |76.4 | |
| | | | | |
| | | | | |
| | | | | |
| | | | | |
| |10.4 | | | |
| | | | | |
| | | | | |
| | | | | |
| | | |314 | |
| | | | | |
| | | | | |
| | |1 | | |
| | | | | |
| | | | | |
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