QUIZ 1-CIRCLES

If you are given the diameter, how can you calculate the radius?

• Multiply the diameter by 2

• Divide the diameter by 2

• Add 2 to the diameter

• Subtract 2 from the diameter

Which of the following is the chord?

• LM

• AE

• AC

• ED

What is the formula for circumference of a circle given the diameter?

• C = π r

• C = π d

• C = 2 π r

• C = 2 π d

If the circumference of a circle is 22π , what is the diameter?

• π

• 22

• 11

• 0

What is the circumference of this circle?

(Use 3.14 for π)

• 452.39 cm

• 75.36 cm

• 452.16 cm

• 75.40 cm

How do you find the area of a circle?

• πd²

• 2πr

• πr²

• 2π²

A cruise ship has a large, circular window. It has a diameter of 6 meters. What is the window's area?

• 31.25 m²

• 29.55 m²

• 30.36 m²

• 28.28 m²

Find the length of minor arc AB, correct to two decimal places.
(Use  $\pi$ = 3.142)

• 56.56

• 65.98

• 395.89

• 9.43

Find the area of the sector, rounding your answer to one decimal place.

• 176.7cm²

• 156.7cm²

• 23.6cm²

• 88.4cm²

The diagram shows a circle with a radius of 15cm. Find the length of major arc RS using   $\pi=\frac{22}{7}.$       

•  $75.42cm^2$  

•  $75.43cm^2$  

•  $75.44cm^2$  

•  $75.45cm^2$