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2 years ago

A circle has a circumference of 45 cm. What is the BEST estimate of the circle’s diameter?

Mathematics

2 answers:

ch4aika [34]2 years ago

8 0

Answer:

C) 15 cm is the best estimate.

Step-by-step explanation:

The exact answer is not there, so 15 is the best estimate.

You can use this equation to help you:

d=C/π

Where d is the diameter.

C is the circumference.

And the last one is Pi.

You know that C = 45, so divide that by Pi (3.14).

45/3.14159 = 14.32

The closest answer is 15.

Hope this helps! Have a great day!

svetoff [14.1K]2 years ago

4 0

Answer:

The best estimate of the circle's diameter is 15cm.

Step-by-step explanation:

Circumference = 2πr = 45cm
=> 2 x π x r = 45 cm
=> 2 x 22/7 x r = 45 cm
=> 44/7 x r = 45
=> 44r/7 = 45
=> 44r = 315
=> r = 7.16 (Rounded)
=> Dia. = 7.16 x 2
=> Dia. = 14.32
=> Dia. ≈ 15 cm

Conclusion:

Therefore, the best estimate of the circle's diameter is 15cm.

Hoped this helped.

$BrainiacUser1357$

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