Test: Circles I - Ambitious

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Question 1:   Calculate the area of a circle if its circumference is $113.1cm$
$468.2c{m}^{2}$
$1017.9c{m}^{2}$
$706.9c{m}^{2}$
$355.3c{m}^{2}$
Question 2:   Calculate the radius of a circle if its area is $78.54cm{}^{2}$
$4cm$
$6cm$
$7cm$
$5cm$
Question 3:   Find the area of a sector:
$453.96c{m}^{2}$
$187.61c{m}^{2}$
$302.64c{m}^{2}$
$907.92c{m}^{2}$
Question 4:   Calculate the angle $\alpha$ if the sector area is $32.72c{m}^{2}$
${140}^{\circ }$
${125}^{\circ }$
${150}^{\circ }$
${170}^{\circ }$
Question 5:   Calculate the area of a circle:
$100.5c{m}^{2}$
$226.2c{m}^{2}$
$50.3c{m}^{2}$
$143.4c{m}^{2}$
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