the edge
Use a ruler to measure it.
You could align the edge of the object with the zero on the ruler and then read off the marking on the ruler which aligned with the other end of the object.
A ruler is usually graduated so that it can be used to measure lengths. A straight edge is just that: it has no marking to help you measure lengths.
Usually a ruler or something like a ruler. Always has a straight edge so you can easily draw straight lines/measure
Depends on what information you do have. But I would suggest you measure it using a ruler, tape measure or similar.
Place the ruler side by side with the object. One of the edges of the object should be in the "0" value of the ruler. Then just see where the other edge is and there you have it.
Lay a ruler across the coin and make sure it measures from one edge through the center to the other edge. Read the diameter from the ruler.
Do what I do with my snakes - use a piece of string to get the approximate length from nose to tail - then lay the string on a ruler to get the measurement.
If you want to measure the length, use a ruler.
A ruler shows set measurements, either in inches or millimeters. You can draw a straight line using the edge of a ruler. Use a ruler to measure the size of a piece of typing paper.
To accurately measure the diameter of a bike wheel, use a tape measure or ruler to measure the distance across the wheel from one edge of the tire to the opposite edge. Make sure to measure from the center of the wheel to get an accurate diameter.
To accurately measure the width of a chain, you can use a caliper or ruler to measure the distance across the widest part of the chain links. Make sure to measure from one outer edge to the opposite outer edge for an accurate measurement.