I forgot so, when calculating a circle's circumference, and area do you measure the circle in inches or centimeters? Also, calculating a rectangular prism's surface area and volume do you use inches or centimeters to measure it? Thanks. Please answer as soon as possible very important.

Answer 1

You would use whichever instrument or ruler you have.
If you have a metric ruler, use centimetres,
then your circumference will be in the same units, namely centimetres, and your area will be cm^2
Noah would have measured a circle in cubits and his circumference would have in cubits and the area would have been cubits^2

It makes no difference what you use, but an American child would probably use inches, while in the rest of the world they would use cm.

Answer 2

So, it wouldn't matter what unit I used? Because I am asking my math teacher gave me a project to find 5 circles in my home to measure and 5 rectangular prisms in my home to measure and I haven't sent in my project yet to make sure there are no mistakes. But, I used centimeters instead of inches. And, do you always use the squared symbol for rectangular prisms' and circles? Thank you

Answer 3

It makes no difference which units you use, as long as you label your dimensions with those units.

however, use common sense which units you pick.
It would not make much sense to use either yards or metres to measure the diameter of a coffee mug, I would use either cm or inches.

areas are always measured in "unit"^2 or square units, since they have 2 dimensions, length and width
( cm^2 or square cm)
Straight lines have only one dimension, namely length.

Answer 4

Thank you for your help it is very much appreciated by me. But, my last question is area, surface area, and volume I have to put the squared symbol (^2) right?