Asked by Sliverstream

Find the circumference of the circle. Use 3.14 for π. Round to the nearest unit.
(Show picture of circle with a diameter, with 21cm at one side)
A) 24cm
B) 66CM
C) 125cm
D) 69cm



Please help me understand, that means don't tell me the answer without explaining it!


Thanks

Answers

Answered by Ms. Sue
The circumference is the distance around a circle.

To find the circumference, use this formula.

C = pi * diameter

Answered by oobleck
just remember your formula for the circumference of a circle of diameter d:

C = πd

π is defined as the ratio of the circumference to the diameter: π = C/d
Answered by Sliverstream

Sooo Sorry if I am getting this wrong,
is it 21 * 3.14?
Answered by Ms. Sue
Yes; 21 * 3.14
Answered by Sliverstream
Which is 65.94..... this rounded to the nearest unit will be 69 cm or 66 cm. I think it is 66 cm. Right?
Answered by Ms. Sue
Yes, 66 cm.
Answered by Sliverstream
Thank you for helping me understand it, Ms. Sue, and Oobleck!
Answered by Ms. Sue
You are welcome.
Answered by MMMMSPRITE
Thanks mrs.sue I understand now
Answered by Roo
Ur awesome mrs sue!
Answered by Abby T^T
thx ms. sue and oobleck!!
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