![]() In addition to measuring specific lengths and segments in straight lines like regular desk rulers, protractors are used to measure and draw angles. More specifically, protractors are a type of specialty rulers that are shaped like half circles they’re not solely straight-edged like standard desk rulers. What’s the difference between rulers and protractors?īasically, all protractors are rulers, but not all rulers are protractors. If you do opt for a plastic ruler, make sure it’s made from either a sturdier type of plastic (like ABS) or more flexible plastic material that can hold up to a lot of bending and fidgeting. Thick plastic rulers are also a good choice for younger kids since they’re waterproof, colorful, and inexpensive to replace, though they will snap and break much easier than wood, rubber, or metal. Durability: A good ruler should not be easily broken or shattered, so look for ones made of real wood, rubber, or metal, preferably steel or stainless steel.In terms of length, most school rulers will be about a foot (12 inches) long, which will suit most K-12 students. These will usually be more useful for older students as they learn subjects like geometry that involve measuring and calculating angles. However, there are a few other shapes out there, namely half circle ones (protractors) and triangular ones. They’re commonly known as desk rulers and are the type you’ll see in most classrooms or back-to-school kits. Length and Shape: Most school rulers will come in a long, thin, rectangular shape. ![]() These types are incredibly useful since they account for both the imperial and metric systems. Most rulers will be marked with both centimeters and inches, with the two different units on opposite edges. You’ll also want to consider which measurement units are marked on the ruler. ![]()
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