Verified answer

Find the circumference in each given radius.

1. 149 cm:

Answer:

The formula to calculate the circumference if you know the radius is as follows:

Circumference = 2 x Radius x π

π = Pi = 3.14, thus, the math to calculate the circumference of a circle with a radius of 149 is:

2 x 149 x 3.14 = 935.72

And the answer to the circumference of a circle with a radius of 149 is approximate:

≈ 935.72

2. 1.09 m

Answer:

The circumference of a circle with radius 1.09 is 6.849(*)

C = 2·π·r

C = π·d
C = √4·π·A π = 3.1415

A = area of the circle

C = circumference or perimeter

r = radius, d = diameter

Step-by-step Solution:

Circumference of a cicle in terms of radius:

Circumference = 2·π·r = 2·3.14·1.09 = 6.84(*)

In terms of diameter:

Circumference = π·d = 3.14·2.18 = 6.85(*)

In terms of area:

Circumference C = √4·π·A = √4·π·3.73 = 6.84(*)

(*) 6.849 meters exactly or limited to de precision of this calculator (13 decimal places).

Note: for simplicity, the operations above were rounded to 2 decimal places and π was rounded to 3.14.

Find the radius in each given circumference.

1. 15.7 cm

Answer:

Circumference of the circle= 15.7 cn

2πr=15.7

r=15.7/2×π

r=2.49 cm

2. 9.06 cm

Answer:

The circumference of a circle with a radius of 9.06 is 56.93(*)

C = 2·π·r

C = π·d

C = √4·π·A π = 3.1415

A = area of the circle

C = circumference or perimeter

r = radius, d = diameter

Step-by-step Solution:

Circumference of a cicle in terms of radius:

Circumference = 2·π·r = 2·3.14·9.06 = 56.93(*)

In terms of diameter:

Circumference = π·d = 3.14·18.12 = 56.9(*)

In terms of area:

Circumference C = √4·π·A = √4·π·257.9 = 56.93(*)

(*) 56.93 cm exactly or limited to de precision of this calculator (13 decimal places).

Note: for simplicity, the operations above were rounded to 2 decimal places and π was rounded to 3.14.

find the radius in each given diameter.

1. 31.8 cm​

Answer:

15.9 cm.

31.8÷2=15.9

HOPE IT HELPS!

Answer:

1. 935.72 cm
2. 6.86 m

1. 2.5 cm
2. 1.44cm

1. 15.9 cm

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