Application of Circumference

The radius of a circle is decreasing at a constant rate of 0.1 cm/sec.  In terms of the circumference C, what is the rate of change of the area of the circle, in square centimeters per second?

• -(0.2)πC

• -(0.1)C

• (0.1)²C

• (0.1)²C

What is the perimeter of the semi-circle?

• 11 yd

• 17.27 yd

• 34.54 yd

• 28.27 yd

Tags

CCSS.3.MD.D.8

Jayne has a very large circular lollipop that has a circumference of 25.12 inches. What would the area of Jayne’s lollipop be?

• 50.24 in.²

• 200.96 in²

• 12.56 in. ²

• 78.88 in^.2

Tags

CCSS.7.G.B.4

Find the perimeter of the Quarter Circle with a radius of 16 cm.

• 57.12 cm

• 100.48 cm

• 25.12 cm

• 50.24 cm

Tags

CCSS.HSG.C.B.5

You are looking to buy a gold coin for your collection.  You find a coin that has a circumference of 31.4 centimeters.  What is the area of 1 side of that gold coin?

• 78.5 cm2

• 15.7 cm2

• 62.8 cm2

• 3.14 cm2

Tags

CCSS.7.G.B.4

A sprinkler that sprays water in a circular area can be adjusted to spray up to 30 feet. To the nearest tenth, what is the maximum area of lawn that can be watered by the sprinkler?

• 188.4 ft²

• 706.5 ft²

• 183.6 ft²

• 2,826 ft²

Tags

CCSS.7.G.B.4

You want to buy the largest pizza in Northern Utah.  You find a pizza that measures 75.36in around.  What is the area that the pizza covers?

• 452.16 in2

• 12 in2

• 24 in2

• 144 in2

Tags

CCSS.7.G.B.4

The diameter of a circle is 3 centimeters. What is the circumference?

• 11.5cm2

• 9.42 cm2

• unicorns are awsome

• 45.3 cm2

Tags

CCSS.7.G.B.4

What is the distance around a circle?

• Circumference

• Area

• Diameter

• Radius

Find the volume of a hemisphere with a great circle circumference of 37.7 centimeters. Round to the nearest hundredths. DO NOT ROUND UNTIL THE VERY END.

Tags

CCSS.8.G.C.9

CCSS.HSG.GMD.A.3