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3 years ago

What is the radius of this circle if the circumference is 18 pi cm? A circle. C = 18 pi cm 3 cm 9 cm 18 cm 36 cm

Mathematics

2 answers:

nirvana33 [79]3 years ago

7 0

Answer:

the answer is 9 cm

Step-by-step explanation:

Afina-wow [57]3 years ago

6 0

Answer:

9 cm

Step-by-step explanation:

$\because \: C = 2\pi \: r \\ \\ \therefore \: 18\pi = 2\pi \times r \\ \\ \therefore \: r = \frac{18\pi}{2\pi} \\ \\ \therefore \: r =9 \: cm$

Hence, radius of circle is 9 cm.

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vampirchik [111]

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4 years ago

What is the midpoint of a line segment with the ends 8,-3 and -5,-9

grandymaker [24]

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4 years ago

Tom built a backyard pen for his new puppy. The length of the pen was 6 1/4 meters and the width was 4 meters. What is the area

gizmo_the_mogwai [7]

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3 years ago

What’s the formulas for D,C and A

Travka [436]

Answer:

Diameter is equal to two times the radius or Circumference/π

Circumference is equal to two times π multiplied the radius

The area of the circle equals to π multiplied by the radius squared

Step-by-step explanation:

Let's find the formulas for d, C and A

d = diameter

C = Circumference

A = Area

r = radius

π ≅ 3.1416

d = 2r or d = C/π

Diameter is equal to two times the radius or Circumference/π

C = 2πr

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A = π * r²

The area of the circle equals to π multiplied by the radius squared

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3 years ago

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shepuryov [24]

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Step-by-step explanation:

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3 years ago