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aleksandr82 [10.1K]
3 years ago
7

Please help!!!

Mathematics
2 answers:
Alex Ar [27]3 years ago
6 0

Answer:

Check bolded below

Step-by-step explanation:

1)radius = 10 in (given), diameter = 2*radius = 2(10 in) = 20 in

formula for circumference => 2πr => 2π(10)

circumference = 20π in

2)diameter = 12 ft (given), radius = 1/2*diameter = 1/2(12 ft) = 6 ft

formula for circumference => 2πr => 2π(6)

circumference = 12π ft

3)radius = 3 m (given), diameter = 2*radius = 2(3 m) = 6 m

formula for circumference => 2πr => 2π(3)

circumference = 6π m

4)diameter = 18 cm (given), radius = 1/2*diameter = 1/2(18 cm) = 9 cm

formula for circumference => 2πr => 2π(9)

circumference = 18π cm

inysia [295]3 years ago
5 0

1.

radius = <u>10 in</u>

diameter = 10 × 2 = <u>20 in</u>

formula = <u>π × d</u>

circumference = π × 20 = <u>62.83 in</u>

2.

radius = 12 ÷ 2 = <u>6 ft</u>

diameter = <u>12 ft</u>

formula = <u>π × d</u>

circumference = π × 12 = <u>37.70 ft</u>

3.

radius = <u>3 m</u>

diameter = 3 × 2 = <u>6 m</u>

formula = <u>π × d</u>

circumference = π × 6 = <u>18.85 m</u>

4.

radius = 18 ÷ 2 = <u>9 cm</u>

diameter = <u>18 cm</u>

formula = <u>π × d</u>

circumference = π × 18 = <u>56.55 cm</u>

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