# Test: Circles I - Normal

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Question 1:   Find the area of the circle: $78.5c{m}^{2}$
$31.4c{m}^{2}$
$15.7c{m}^{2}$
$62.8c{m}^{2}$
Question 2:   Find the circumference of the circle: $118.4cm$
$75.4cm$
$37.7cm$
$455.4cm$
Question 3:   Find the area of a circle with a diameter: $d=15cm$
$148.04c{m}^{2}$
$47.12c{m}^{2}$
$176.71c{m}^{2}$
$706.86c{m}^{2}$
Question 4:   A circle has a radius of $7cm$. What is the diameter of the circle?
$14cm$
$3.5cm$
$11cm$
$43.9cm$
Question 5:   Find the measure of the angle $\alpha$: ${87}^{\circ }$
${80}^{\circ }$
${90}^{\circ }$
${85}^{\circ }$
Question 6:   Find the area of a sector: $157.1c{m}^{2}$
$125.7c{m}^{2}$
$103.7c{m}^{2}$
$314.2c{m}^{2}$
Question 7:   Find the arc length: $10.47cm$
$7.85cm$
$15.71cm$
$6.28cm$
Question 8:   Calculate the circumference of a circle if a radius is $11cm$
$138.23cm$
$380.13cm$
$69.12cm$
$108.57cm$
Question 9:   Calculate the area of a circle if radius is $8cm$
$78.96c{m}^{2}$
$201.06c{m}^{7}$
$50.27c{m}^{2}$
$402.12c{m}^{2}$
Question 10:   Calculate the area of a circle if circumference is $72\pi cm$
$226.2c{m}^{2}$
$517.6c{m}^{2}$
$1017.9c{m}^{2}$
$4071.5c{m}^{2}$