The circumference of a circle has the formula:
C = 2 π r
Now when it is dilated by a factor of 4, this only means
that the radius is also multiplied by a factor of 4, therefore the new
circumference is:
C’ = 2 π (4 r)
C’ = 8 π r
So it also grows 4 times.
Answer:
<span>The circumference will be 4 times greater than the
original.</span>
To find 8x397, I used the stack method.
a.) 397
<u> x 8 </u>
3176
b.) This method works best because it's easy to do, and the factors aren't too big to multiply by hand, unless it was like a billion times a million. But in this case, it's not, so it's perfectly fine to use the stack method.
I hope this helps and have a good night! :D
