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