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Circles!!! Parts, Circumference, Area, and Semi- and Quarter Circles Flashcards | StudBud
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Circles!!! Parts, Circumference, Area, and Semi- and Quarter Circles
Circles!!! Parts, Circumference, Area, and Semi- and Quarter Circles
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A #math quiz that reviews formulas and problems related to circle geometry.
Flashcards
23 cards
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Questions
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Answers
1
Find the circumference of the given circle. (C=π⋅d and π=3.14)
7.065 in.
56.52 in.
28.26 in.
14.13 in.
2
How do we find the area and circumference of a quarter circle?
Multiply the area and circumference of the whole circle by 4
Divide the area and circumference of the whole circle by 4
3
Find the circumference of the given circle. Remember, C=π⋅d and π=3.14.
31.4 cm.
31.4
62.8 cm
15.7 cm
4
Find the area of the semicircle.
314 cm2
39.25 cm2
78.5 cm2
62.8 cm2
5
Find the area of the semicircle.
132.665 m2
81.64 m2
66.3325 m2
530.66 m2
6
Find the diameter of the given circle.
25 cm.
10 cm.
2.5 cm.
5 cm.
7
Which formula do we use to find the area of a circle?
A=π⋅r
A=π⋅d2
A=π2⋅r
A=π⋅r2
8
Find the area of the given circle. Remember, A=π⋅r
2
and π=3.14.
50.24 cm2
3.14 cm2
12.56 cm2
6.28 cm2
9
Find the area of the given circle. Remember, A=π⋅r
2
and π=3.14.
50.24 m2
100.48 m2
200.96 m2
803.84 m2
10
Which statement about pi (π) is true? (There may be more than one correct answer)
π can be eaten.
π equals 3.
π is a ratio.
π equals C÷d.
11
What are the lengths of the radius and diameter of the given circle?
r=9 in. d=9 in.
r=18 in. d=18 in.
r=18 in. d=9 in.
r=9 in. d=18 in.
12
Find the area of the given circle. Remember, A=π⋅r
2
and π=3.14.
38.936 cm2
30.1754 cm2
19.468 cm2
120.7016 cm2
13
Find the area of the given circle. Remember, A=π⋅r
2
and π=3.14.
62.8 ft2
125.6 ft2
314 ft2
1256 ft2
14
Find the circumference of the semicircle.
5.652 ft
11.304 ft
22.608 ft
45.216 ft
15
How do we find the area and circumference of a semicircle?
Divide the area and circumference of the whole circle by 2
Multiply the area and circumference of the whole circle by 2
16
Find the circumference of the given circle. (C=π⋅d and π=3.14.)
5.495 m.
21.98 m.
43.96 m.
10.99 m.
17
Find the radius of the given circle.
12 in.
6
6 in.
24 in.
18
Find the area of this composite shape. Use π=3.14.
414 ft2
162.8 ft2
131.4 ft2
139.25 ft2
19
Find the area of the shaded region. Leave your answer in terms of π.
113.04 in2
36π in2
6π in2
75.36 in2
20
Find the circumference of the semicircle.
100.166 ft
200.332 ft
400.664 ft
50.083 ft
21
Which formula gives the relationship between the radius and diameter of any circle?
d=2⋅r
d=r
d=r2
2⋅d=r
22
When we measured paper plates, what formula did we discover?
Radius
Circumference
Chord
Area
23
Which formula gives us the circumference of a circle?
C=π⋅2
C=π⋅r2
C=π⋅d
C=π⋅r
