An equilateral triangle is a triangle that has all equal sides and all equal angles. Because a triangle’s interior angles always add up to 180° and. 180. 3. = 60 , an equilateral triangle will always have three 60° angles.

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## Why can’t we have a triangle with a side length of zero?

1 Answer. Yes, and any such triangle is called a degenerate triangle. If the distance between two points a and b is zero, then the corresponding vertex ¯ab is the zero vector, which is collinear to every vector (which includes ¯ac and ¯bc).

## How can I measure without a protractor?

Measure the length of the vertical line. Line up the short end of your ruler with the bottom line of the small acute triangle. Read up the ruler to the point where the vertical line meets the open ray of your obtuse angle. This is the length of your vertical line.

## Can I use my iPhone as a protractor?

Protractor helps you to measure angles quickly and easily. This app turn your iPhone into a handy pocket protractor that can measure angles in both degrees and radians.

## How do you use a protractor to measure triangles?

Align the horizontal edge of the protractor with the base of the triangle. Place the center point of the protractor on the vertex of the angle. Follow the side of the triangle until it reaches the angle measurement mark. Note the measurement….

## What are 3 devices used to measure angles?

There are several types of measuring tools that measure angles, and they fall into one of three categories: protractors, squares and compasses. There are many variations of these basic categories. A protractor is the most common device used to measure angles.

## What instrument is used to measure an angle of 40?

Measuring angles using a protractor.

## What is angle measuring tool called?

Protractor, any of a group of instruments used to construct and measure plane angles. The simplest protractor comprises a semicircular disk graduated in degrees—from 0° to 180°.

## How do you use a multi angle measuring tool?

Easy to use Simply lay it on your work area, slide the angle measuring tool into the desired shape and tighten the screws. The multi-angle ruler can be brought into any position and fixed in seconds to create your own template.

## How do you use T bevel?

Lay the T bevel against the surface of the angle cut to be copied. Rotate the inside edge of the blade to the existing angle until it matches the angle being transferred. Tighten the wing nut until it locks the blade and handle in position. Place the T bevel on the working surface and transfer the angle.

## How do you calculate angle cuts?

The formula involves dividing 360 by the number of sides to calculate the corner angle. Then divide it by two to get the miter angle. If you’re making a five-sided project with all sides equal, you divide 360 by five to get 72 degrees. So each joint or corner forms a 72-degree angle….

## How do you measure and cut a 45 degree angle?

How to Mark Miter Cuts. Miter cuts are angled crosscuts, which most often measure 45 degrees. For a 45-degree cut, measure to the long end of the miter, and set your combination square or layout square on the mark. Draw the cut line….