Test:
Circles I - Ambitious
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Question 1:
Calculate the area of a circle if its circumference is
$113.1cm$
A
$468.2c{m}^{2}$
B
$355.3c{m}^{2}$
C
$706.9c{m}^{2}$
D
$1017.9c{m}^{2}$
Question 2:
Calculate the radius of a circle if its area is
$78.54cm{}^{2}$
A
$6cm$
B
$5cm$
C
$4cm$
D
$7cm$
Question 3:
Find the area of a sector:
A
$187.61c{m}^{2}$
B
$453.96c{m}^{2}$
C
$907.92c{m}^{2}$
D
$302.64c{m}^{2}$
Question 4:
Calculate the angle
$\alpha $
if the sector area is
$32.72c{m}^{2}$
A
${140}^{\circ}$
B
${125}^{\circ}$
C
${170}^{\circ}$
D
${150}^{\circ}$
Question 5:
Calculate the area of a circle:
A
$143.4c{m}^{2}$
B
$50.3c{m}^{2}$
C
$226.2c{m}^{2}$
D
$100.5c{m}^{2}$
Question 6:
Calculate the area of a square if the area of a circle is:
$64\pi c{m}^{2}$
:
A
$128c{m}^{2}$
B
$112c{m}^{2}$
C
$64c{m}^{2}$
D
$116c{m}^{2}$
Question 7:
Calculate the radius length of the circle:
A
$13cm$
B
$12cm$
C
$15cm$
D
$6.5cm$
Question 8:
Calculate the area of the shaded region:
A
$7.7c{m}^{2}$
B
$12.2c{m}^{2}$
C
$11.1c{m}^{2}$
D
$6.5c{m}^{2}$
Question 9:
Calculate the area of the shaded figure:
A
$7.41c{m}^{2}$
B
$15.71c{m}^{2}$
C
$12.21c{m}^{2}$
D
$13.25c{m}^{2}$
Question 10:
Calculate the area of the shaded region:
A
$13.66c{m}^{2}$
B
$12.7c{m}^{2}$
C
$14c{m}^{2}$
D
$15.25c{m}^{2}$
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