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How can you calculate the size of an exterior angle of a regular octagon?
The exterior angles of any polygon add up to 360. 360/8 = 45
How do you find the area of a 30-60degree angle?
90
How do you calculate the height of right triangle given the base?
If you're only given the base, then you can't calculate the other leg. If you have any one of the following, then you can calculate all of the parts of the triangle: -- length of the other leg -- length of the hypotenuse -- size of either acute angle
Formula used to calculate the length of the long side of the triangle?
The formula can't even be written unless you know either -- the size of one of the other sides of the triangle, and the size of the angles at both ends of it, or else -- the size of both other sides of the triangle, and the size of the angle between them.
What is the size of each interior angle of a regular decagon?
A ten-sided polygon. The sum of the angles of a decagon is 1440°. so 1440°÷10=144° ---------------------------------------------------------------------------- The easiest way to calculate this is to calculate the exterior angle and use the fact that the exterior and interior angles are supplementary. Sum exterior angles = 360° → Each exterior angle of a regular decagon is 360° ÷ 10 → Each interior angle of a regular decagon = 180° - 360° ÷ 10 = 144°
