# how to find the measure of an angle without a protractor

of the angle we have to measure, and therefore, the angle

The breeds of angles.

To continue the example, with a slope of 0.71428571, the angle is 35.5 degrees. Line up the short end of your ruler with the ray of the angle that is horizontal rather than diagonal. Write the description of the procedure, the data you recorded, the result, and the mathematical facts that justify it. % of people told us that this article helped them. Daten über Ihr Gerät und Ihre Internetverbindung, darunter Ihre IP-Adresse, Such- und Browsingaktivität bei Ihrer Nutzung der Websites und Apps von Verizon Media. Line up one of the arms of the given angles with the baseline of the protractor and measure them accurately. Make sure your line is perfectly straight.

To continue the example, the equation "slope = 5/7" would yield "slope = 0.71428571.". You can take picture of any object that you would like to measure, for example, a car, road, house, stairs or a mountain, the protractor is transparent, after you uploaded the image, it will be display in the background. I know this because the table included with this Instructable shows that for an angle of 20° the ratio is 4 units high and 11 units long, or 4:11. (An angle is defined as a figure formed by two "rays," which are straight line segments.). Tip: If you get confused because the angle is upside down, turn your paper and ignore the reflex angle until the last step.

You have the possibility to set the interval of the angles; if the starting angle is 0, 180 or random. By dave.vaness.79 Follow.

The most common protractors are found in the school supply section of big box retailers. By determining the degrees of the acute angle, you can calculate the degrees in the reflex angle. Measure the angle in degrees. To continue the example, if your slope is 0.5, the acute angle is a 26.565-degree angle. Mark your vertex with a dot, then use the long side of your ruler to draw a straight line to the left of the vertex. Für nähere Informationen zur Nutzung Ihrer Daten lesen Sie bitte unsere Datenschutzerklärung und Cookie-Richtlinie.

On measuring an angle without a protractor. Divide rise by run to find the slope of the acute angle. To continue the example, with a slope of 0.71428571, the angle is 35.5 degrees. triangle shown above is a right triangle with hypotenuse d and leg e/2. Measure the length of the vertical line.

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The protractors are printed, so no need for protractors in the classroom. This is the length of your vertical line. wikiHow's. Measure their This means that if you look at the reflex angle, you'll also see an acute angle inside the rays of the reflex angle. Those methods can usually yield more precise angles than a protractor can. However, if you don't have a protractor handy, you can determine the size of an angle using the basic geometric principles of triangles. Each student is given an angle drawn on How to measure an angle without a

The unit of measurement you use to quantify the lengths of the 2 lines is irrelevant – just make sure you're using the same unit for both lines. (22.5° is also included) As you can see the error is never more than 5/100s of a degree. If you really can’t stand to see another ad again, then please consider supporting our work with a contribution to wikiHow. Subtract the degrees of the acute angle from 180. wikiHow's Content Management Team carefully monitors the work from our editorial staff to ensure that each article is backed by trusted research and meets our high quality standards. And then what you want to do is either rotate the angle or rotate the protractor. Most smartphones are equipped with them, but you can also download a free app or access a free calculator online.

Measure the length of the adjacent side to find the, Measure the length of the opposite side to find the. You want to rotate the protractor so that the 0 angle, or kind of the 0 mark, is at one of the sides of the angle. You can use a combination of the above methods by drawing sight lines on a piece of paper.

Figuring out the measure of an angle is easier because you can see the line for the angle through the protractor.

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