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2 years ago

Find the circumference of each circle, use 3.14 for . Include units and round to the nearest tenth. Show work

Mathematics

1 answer:

klio [65]2 years ago

8 0

Answer:

Answer:-

a) The circumference of the circle C = 21.98 m

b) The circumference of the circle C = 37.68 ft

c) The circumference of the circle C = 40.82 km

d) The radius of the circle = r = 11 c.m

The Diameter of the circle 'd' = 2(r) = 2(11) =22 c.m

e) The circumference of the circle = 21.98 inches

Step-by-step explanation:

a) In First diagram

Given radius of the circle 'r' = 7.1 m

The circumference of the circle C = 2πr

C = 2 (3.14) (7.1)

C = 21.98 m

The circumference of the circle C = 21.98 m

b) In second diagram

Given diameter of the circle 'd' = 12 ft

The circumference of the circle C = 2πr

C = π(2 r)

Diameter = 2 X radius

d = 2 r

The circumference of the circle C = πd

C = 3.14 ×12

The circumference of the circle C = 37.68 ft

c)

Given diameter of the circle 'd' = 13 km

The circumference of the circle C = 2πr

C = π(2 r)

Diameter = 2 X radius

d = 2 r

The circumference of the circle C = πd

C = 3.14 ×13

The circumference of the circle C = 40.82 km

7) The circumference of the circle C = 2πr

Given The circumference of a circle is 34.54 cm

Now 2πr = 34.54

2(3.14) r = 34.54

$r = \frac{34.54}{3.14} = 11$

The radius of the circle = r = 11 c.m

The Diameter of the circle 'd' = 2(r) = 2(11) =22 c.m

8) Given radius of the circle 'r' = 3.5 inches

The circumference of the circle C = 2πr

C = 2 (3.14) (3.5)

C = 21.98

The circumference of the circle = 21.98 inches

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