Circles Review

Area & Circumference

100

If the diameter of a circle is 10m what is its circumference?

31.4m

200

If the diameter of a circle is 14m, what is its area?

153.86 m²

300

If the area of a circle is 530.66 cm², what is its radius?

13cm

400

If the area of a circle is 254.34 km², what is its circumference?

56.52 km

Arc & Sector

100

If the Circumference is 10m and Central Angle is 180^o, what is the Arc Length?

5m

200

If Sector Area is 7m² and Area is 63m², what is the Central Angle?

40^o

300

If Arc Length is 8m and Central Angle is 30^o, what is the Circumference?

96m

400

If the Sector Area is 14m² and the Central Angle is 120^o, what is the total area?

42m²

Applications

100

The Torpedo Funnel at Calypso waterpark is a circle that measure 45m across at its widest point. What is
distance around the funnel?

141.4m

200

Is it ever possible for a circle's chord to be longer than its diameter?

No

300

If my pizza has a circumference of 150cm, and my slice has a central angle of 36^o, what is the length of my crust?

15cm

400

A baseball diamond has a central angle of 110^o and a radius of 27m. What is the area that it covers?

699.44 m²