# Test: Circles I - Ambitious

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