i have no idea son
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If the initial velocity is v, at an angle x to the horizontal, then the vertical component is v*sin(x) and the horizontal component is v*cos(x).
Area = 1/2 b h b : base h : height The height is vertical side of the right angle; the base is the horizontal side of the right angle
Any angle between 0 and 180 degrees or 0 and pi radians.
The answer depends on which angle is given: whether it is the angle made by the sloping face with the base, or the angle at the apex or even the angle that the sloping face makes with the vertical. Essentially, though, you use Pythagoras's theorem or, equivalently, the sine rule.
The angle of depression of a point is the angle between the line joining that point and the point of observation and the horizontal from the point of observation.