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The selection of multi angle measuring ruler is always getting an update on AliExpress. The related products of multi angle measuring ruler: When you need more help to find the most popular multi angle measuring ruler, all you need to do is sort by orders. Enter any valid input (3 side lengths, 2 sides and an angle or 2 angle and a 1 side) and our calculator will do the rest. If you need help choosing ruler, read real reviews of ruler left by shoppers to help narrow down your choices! Our reviews will help you find the best ruler. Clicking into the item detail page and scroll down to read the reviews left by shoppers on our website, once you find an option of multi angle measuring ruler that catches your eye. You can get a bunch of other information of multi angle measuring ruler on quality, price and tips that other shoppers have found helpful. So, if there are no more Fermat primes ( as it seems the case), the greatest number of sides of a ruler+compass odd n-gon is $4294967295$.The related information of multi angle measuring ruler: Find more deals on ruler online and shop safe with AliExpress. The sequence is finite and quite short ( A045544) Now, something very interesting happens with the possible n-gons (constructed with ruler and compass) with odd number of edges. The first values of the sequence, i.e., the possible n-gons, are following: The integer sequence of the numbers of edges of regular polygons constructible with ruler and compass is A003401
Once you have the rational number (if the numerator and denominator are not too big) you might construct with ruler and compass a quite good approximation of the angle. The power of this method, is that you can compute the trigonometric function (cosine, sine, or tangent) of any angle $\alpha$ and then approximate it by a rational number. Get the Angle Ruler Machine Table Saw Angle Hexagonal Ruler online at Jumia and other Generic Measuring Tools & Scales at the best price in Egypt Enjoy. You can draw any angle whose cosine, sine, or tangent is a rational number, i.e., $\dfrac$
I can give you another sufficient condition to create angles with compass and ruler: Angles with rational trigonometric values Concerning the nice answer of Ethan, I must say that not every angle constructed with rule and compass must form a regular n-gon.
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