Use a protractor to measure the given angle from the left-hand endpoint of the longest given side, mark it with a cross and draw a line from the endpoint through this cross. Our awesome selection of rulers covers every base through from smaller 15cm rulers to metre rulers built from materials ranging from wood to plastic to metal. A centimeter is smaller than an inch. The long hash marks under which numbers are written on the ruler denote centimeters.

There are many reasons to use a digital ruler over a physical one.First, you can take measurements anywhere – whether you’re in the kitchen, office, or field.And because digital rulers are accurate to the millimeter, you’ll always get an accurate reading, no matter how big or small the object you’re measuring.In addition, a digital ruler allows you to easily switch between metric and imperial units of measurement, making it perfect for use in both the United States and Canada. Begin with a construction line and mark a zero point and a 3 point. Make a mark. Notice that I'm not using units of measure. You can use millimeters (preferred) or inches or anything in between.X and Y are the dimensions of the rectangle needed, and A and B are the distances from a corner. Use the ruler to measure those distances along each edge of the paper and mark those locations: Use a protractor to measure the angle on the right-hand endpoint of the given side, mark it with a cross and draw a line from the endpoint through this mark.

The second is an Angle, Side, Angle (ASA) construction where two angles and the side between them is known. Here, the shoelace is 17.6 cm long in metric units of length, and 7 inches long in customary units of length. When measuring in inches, remember that there are twelve inches in a foot.So if you want to know how many feet an object is, divide the number of inches by twelve.I prefer using metric measurements for this type of project. You can adjust the numbers to fit your workspace. Let's say that you have a small piece of paper on which you wish to create your square. Instead of drawing the second line as described above, consider to have a piece of paper with the length necessary for the conditions (120 mm) and position it with the zero point on the first line. Move the paper in an arc until it meets with your 150 mm point on the ruler. You can then mark the base paper with your points for a perfect square without having to erase misplaced lines. A millimeter is even smaller than a centimeter. The smaller hash marks between each centimeter represent millimeters.

Measure from one of the marks to the other and it should be a 5 point. If so, you have your right angle. Finally, digital rulers are simply more convenient than physical ones.They are small and easy to carry, so you always have one on hand when you need it.And because they don’t require batteries or any other power source, you never have to worry about that. How to use the digital ruler Another great advantage of using a digital ruler is that you can measure objects that are difficult to measure with a physical ruler.For example, if you are trying to measure the length of a piece of fabric, it can be difficult to get an accurate measurement with a physical ruler because the fabric can bunch or stretch.However, with a digital ruler you can simply lay the fabric flat on a table and measure accurately.Finally, when it comes to units of measurement, there are two main types: Imperial and Metric.If you’re in the United States, chances are you’ll want to use an imperial ruler (inch).However, if you are in Europe or other parts of the world where the metric system is used, a metric ruler (centimeter) is more appropriate. Digital ruler FAQ Position your device (tablet, phone or laptop) so that the screen is level with the object you want to measure. If you are trying to measure something small, zoom in on the object so that it fills your screen.This makes it easier to get an accurate reading. When it comes to choosing the right size digital ruler, there are a few things to keep in mind.The first is the size of your screen.The second is the resolution of your screen.And the third is the unit of measure you need.

The paper has perfect right angles at the corners and you can take advantage of that. If you measure only along the edges of the paper, you don't have to worry about error due to the ruler not being perpendicular. Use the ruler just for measuring and drawing straight lines.The first is a Side, Angle, Side (SAS) construction where two sides and the angle between them is known.