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7th Grade Geometry: Circles - Problems & Formulas Flashcards | StudBud
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7th Grade Geometry: Circles - Problems & Formulas
7th Grade Geometry: Circles - Problems & Formulas
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Diameter, circumference, and area problems with possible formula choices.
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Questions
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Answers
1
The length of the diameter of a circle is 10 cm. Find the radius. Choose a formula.
C = πd
A = πr2
C = 2πr
d =2r
2
How much fencing is required to enclose a circular pool whose radius 8ft. Choose a formula.
C = 2πr
A = πr2
C = πd
d = 2r
3
What is the area of the circle with a radius of 15 inches? Choose a formula.
d = 2r
C = πd
C = 2πr
A = πr2
4
Which is the following is a radius?
AB
BA
PA
APB
5
If the radius is 8, what is the diameter? Choose a formula.
d = 2r
C = 2πr
C = πd
A = πr2
6
A water sprinkler sends out water in a circular pattern. How large is the watered area ?
C = πd
d = 2r
C = 2πr
A = πr2
7
If the radius is 2 cm, what is the diameter?
3.14 cm
6.28 cm
1 cm
4 cm
8
The school is planting grass on the interior of the track. Find the amount of seed needed.
d= 2r
A = πr2
C = 2πr
C = πd
9
Find the circumference of the circle. Choose a formula.
C = πd
A = πr2
C = 2πr
d = 2r
10
Find the circumference of the circle. Choose a formula.
A = πr2
C = πd
C = 2πr
d = 2r
11
If 25 mi is the radius, what is the circumference of the circle? Choose a formula.
C = 2πr
d = 2r
C = πd
A = πr2
12
The radius of a circle is 10. 3x - 8 is the diameter. Solve for x. Choose a formula.
C = 2πr
C = πd
d = 2 r
A = πr2
13
The distance around a meteor crater is 9,327 ft. Find the diameter. Choose a formula.
C = πd
A = πr2
d = 2r
C = 2πr
14
The distance around a circle is 314 in. What is the diameter? Use 3.14 for π. Choose a formula.
C = πd
d = 2r
A = πr2
C = 2πr
15
Name the diameter of the circle.
SP
QR
PR
RPQ
