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# Measuring lengths (cm, m)

Sal measures objects with a ruler.

## Want to join the conversation?

• is measureing your backyard in meters unusual?
• It depends! If you live in America, Liberia, or Myanmar, you are more likely to measure it in feet or yards. However, people in other countries measure things in meters.
• what does dimension mean
• Dimension in math can be expressed in three dimensions. It is the way a figure is represented and measured. The first dimension is a one dimensional line, (1D) which only has length and height. The second is a two dimensional plane (2D), which has height, length, but area. An example of this would be a shape like a square. Finally, a three dimensional figure (3D) has length, height, and depth, and surface area. Think of a three dimensional figure as an object that looks like you can hold it. Examples of three dimensional objects are cubes, spheres, and much more.
• Lets say something had a negative length. What would that mean? Or maybe, what would that look like?
• I don't believe that a negative length is possible. It's a little hard to explain. Length is how long something is, so you can only work with positive numbers, because you sort of "count" how long something is, like how many inches long. When you count you have to start at 0, and move up from there. If it were possible, I have no idea what it would look like. I guess that's something to think about :) It's a difficult concept to understand, but I hope I helped a little bit.
• How much bigger is an inch form a centimeter? Is it about 2.6 times bigger?
• an inch is 2.54 times a centimeter.
• How did he get eight meters? did he round and if so why? it didn't say to round so I am terribly confused! plz help me someone because I want to pass this math.