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