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5 votes
A circle has a circumference of 18cm. What is the diameter of the circle?​

2 Answers

7 votes

Answer:

18/π

Explanation:

Since 2 × π × r is the circumference of the circle,

2πr = 18

πr = 9

r = 9/π

Since the diameter is 2x the radius,

2r = d

2 × 9/π = d

18/π = d

User Squirrel
by
8.1k points
0 votes

Answer:

Around 5.73. The exact answer is 18/pi. Why? The diameter is twice the radius (2r) The formula of the circumference if 2 pi R

if we divide 18, the circumference by pi, we get the diameter.

Explanation:

User Tobias Baumeister
by
8.2k points

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