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How do you figure out the angles of a circle when one angle is given?
A complete circle is 360 degrees. If one angle is given, then that angle can be taken away. For instance: an angle of 90 degrees is a quarter of a circle - measured clockwise from 0. 90 degrees from 360 means that 3/4 or 270 degrees is remaining.
Why are sine functions such good models for repetitive behavior?
Repetitive behavior can be described by a point moving in a circle. The time of repetition is equivalent to time taken by that particle to complete that circle. When the point moves in a circle, its angle changes from 0 to 360 degrees; all of these values can be given by a sine function or a cosine function.
Why is 90 degree not taken as the angle of reference in trigonometry?
The angle of reference is in the first quadrant, and 90 degrees angle is not in the quadrant.
Is there an outer circle in football?
yes , there is a outer circle near the goal from where the goal is to be taken.
Three radii in a circle form three angles-Two of the angles measure 130 degrees each-What is the measure of the third angle?
The idea is that three lines coming out from the center point of a circle (three radii) form three angles -- imagine, for an easy example, the Mercedes-Benz logo. Then the question is: if two of the angles each measure 130 degrees, what does the third angle measure? Well, the first two together measure 260 degrees. So, how many degrees in a circle overall are left, once 260 are taken out? There are 360 degrees in a circle, so the answer is 100.
