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2. Solution of triangles - Wikipedia

   en.wikipedia.org/wiki/Solution_of_triangles

   Since no triangle can have two obtuse angles, γ is an acute angle and the solution γ = arcsin D is unique. If b < c, the angle γ may be acute: γ = arcsin D or obtuse: γ ′ = 180° − γ. The figure on right shows the point C, the side b and the angle γ as the first solution, and the point C ′, side b ′ and the angle γ ′ as the ...

3. Acute and obtuse triangles - Wikipedia

   en.wikipedia.org/wiki/Acute_and_obtuse_triangles

   In an acute triangle, the sum of the circumradius R and the inradius r is less than half the sum of the shortest sides a and b: [4]: p.105, #2690 + < +, while the reverse inequality holds for an obtuse triangle. For an acute triangle with medians m a, m b, and m c and circumradius R, we have [4]: p.26, #954

4. Involute gear - Wikipedia

   en.wikipedia.org/wiki/Involute_gear

   The pressure angle is the acute angle between the line of action and a normal to the line connecting the gear centers. The pressure angle of the gear varies according to the position on the involute shape, but pairs of gears must have the same pressure angle in order for the teeth to mesh properly, so specific portions of the involute must be ...

5. Sine and cosine - Wikipedia

   en.wikipedia.org/wiki/Sine_and_cosine

   In mathematics, sine and cosine are trigonometric functions of an angle.The sine and cosine of an acute angle are defined in the context of a right triangle: for the specified angle, its sine is the ratio of the length of the side that is opposite that angle to the length of the longest side of the triangle (the hypotenuse), and the cosine is the ratio of the length of the adjacent leg to that ...

6. File:Acute Angle (PSF).svg - Wikipedia

   en.wikipedia.org/wiki/File:Acute_Angle_(PSF).svg

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7. Special right triangle - Wikipedia

   en.wikipedia.org/wiki/Special_right_triangle

   The 30°–60°–90° triangle is the only right triangle whose angles are in an arithmetic progression. The proof of this fact is simple and follows on from the fact that if α, α + δ, α + 2δ are the angles in the progression then the sum of the angles 3α + 3δ = 180°. After dividing by 3, the angle α + δ must be 60°. The right angle ...

8. Hundreds of California prisoners are fighting the LA fires ...

   www.aol.com/hundreds-california-prisoners...

   Hundreds of prisoners are helping to battle the wildfires in the Los Angeles area.. Incarcerated firefighters earn $26.90 to $34 for each 24-hour shift. It's far below California's minimum wage of ...

9. Sharp angle - Wikipedia

   en.wikipedia.org/wiki/Sharp_angle

   Print/export Download as PDF; Printable version; In other projects ... Sharp angle may refer to: Acute angle; Sharp's angle of the hip; This ...