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What is the area of a circle when the radius is 15?
Area of a circle= (22/7)*r^2 where, r is the radius of the circle when r=15, area of the circle= 3.14*15*15 = 706.5 sq.units
What is the radius of a circle with a diameter of 15 cm?
The diameter of a circle is twice its radius. Thus the radius of a circle is half its diameter. → a circle with a diameter of 15 cm has a radius of 15/2 cm = 7.5 cm
What is 15 percent off of 175?
15 percent of 175 is 26.25; therefore, 175 less 15 percent is 148.75.
15 is 30 of what number?
15 percent of 100 is 15, so 15 percent of 200 is 30!
What is a half angle?
A half angle is just what it sound like; it's half the measure of an angle. If you have an angle of 30 degrees, the half angle is 15 degrees. Simple and easy. Where it comes in handy is in construction of something like, say, an isosceles triangle inside a circle. If you have the two equal equal angles, you can find the third angle. Then you can construct it by drawing a chord across the circle through its diameter, then using the half angle to draw in one side. Repeating the process on the other side of the diameter will give you the other side of the triangle. By drawing in a chord connecting the points where the other two chords (drawn off the half angles on either side of the diameter) intersect the circle, you'll have completed the construction of the isosceles triangle.
