A circle has a circumference of 45 cm. What is the BEST estimate of the circle’s diameter?
2 answers:
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!
<u>Answer:</u>
- <u>The best estimate of the circle's diameter is 15cm.</u>
<u>Step-by-step explanation:</u>
- 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
<u>Conclusion: </u>
Therefore, the best estimate of the circle's diameter is 15cm.
Hoped this helped.
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