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45 is an odd number and a Størmer number, as well as the 9th triangular number [1] and 5th hexagonal number. [ 2 ] 45 degrees is half of a right angle. It is also the smallest positive number that can be expressed as the difference of two nonzero squares in more than two ways: 7 2 − 2 2 {\displaystyle 7^{2}-2^{2}} , 9 2 − 6 2 ...
= 1.782 661 84 (45) × 10 −36 kg [3] gamma: γ ≡ 1 μg = 1 μg grain: gr ≡ 1 ⁄ 7000 lb av ≡ 64.798 91 mg: grave: gv grave was the original name of the kilogram ≡ 1 kg hundredweight (long) long cwt or cwt ≡ 112 lb av = 50.802 345 44 kg: hundredweight (short); cental: sh cwt ≡ 100 lb av = 45.359 237 kg: hyl; metric slug: ≡ 1 kgf ...
But / = is not a constructible angle, since = is not the product of distinct Fermat primes as it contains 3 as a factor twice, and neither is /, since 7 is not a Fermat prime. [ 8 ] It results from the above characterisation that an angle of an integer number of degrees is constructible if and only if this number of degrees is a multiple of 3 .
A launch angle of 45 degrees displaces the projectile the farthest horizontally. This is due to the nature of right triangles. Additionally, from the equation for the range :
The table consists of 45 pairs of facing pages. Each pair is labeled at the top with an angle, from 0 to 44 degrees, and at the bottom from 90 to 45 degrees. (The 44–45 degree page being a single side.) The first column on each page of the table is an angle increment in minutes, to be added to the degree value at the top of the page.
The 42nd parallel north is a circle of latitude that is 42 degrees north of the Earth's equatorial plane. It crosses Europe, the Mediterranean Sea, Asia, the Pacific Ocean, North America, and the Atlantic Ocean. At this latitude the sun is visible for 15 hours, 15 minutes during the summer solstice and 9 hours, 6 minutes during the winter ...
A degree (in full, a degree of arc, arc degree, or arcdegree), usually denoted by ° (the degree symbol), is a measurement of a plane angle in which one full rotation is 360 degrees. [ 4 ] It is not an SI unit —the SI unit of angular measure is the radian —but it is mentioned in the SI brochure as an accepted unit . [ 5 ]
This is a defining factor for the shape of a screw thread. Standard values include: Name Code Angle ... 45° DIN 2781 German buttress threads [6] S 30° DIN 513