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find the circumference and area of each circle. Use 3.14 for π15. radius = 3in 16. diameter = 6cm17. diameter = 5ft

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Answer

15) Radius = 3 inches

Circumference = 18.84 inches

Area = 28.26 square inches

16) Diameter = 6 cm

Circumference = 18.84 cm

Area = 28.26 cm²

17) Diameter = 5 ft

Circumference = 15.5 ft

Area = 19.625 ft²

Step-by-step explanation

The circumference of a circle is given as

Circumference = 2πr

where

π = pi = (22/7) = 3.14

r = radius of the circle

In case the diameter is given, since the diameter is twice the size of the radius,

D = 2r

Circumference = πD

The Area of a circle is given as

Area = πr²

In terms of the diameter,

Area = (πD²/4)

So, we can answer the questions now

15) Radius = 3 inches

Circumference = 2πr

= 2π (3)

= 6π

= 18.84 inches

Area = πr²

= π(3)²

= 9π

= 28.36 square inches

16) Diameter = 6 cm

Circumference = πD

= π (6)

= 6π

= 18.84 cm

Area = (πD²/4)

= [π(6)²/4]

= 9π

= 28.36 cm²

17) Diameter = 5 ft

Circumference = πD

= π (5)

= 5π

= 15.7 ft

Area = (πD²/4)

= [π(5)²/4]

= (25π/4)

= 19.625 ft²

Hope this Helps!!!

User Peter Gerdes
by
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