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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.

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Q: What is a half angle?

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To bisect an angle is to divide the angle in half.

One half of a right angle is a 45 degree angle.

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Double angle and half angle in mathematics refer to the formulas used to express trigonometric functions of angles equal to 2a or 1/2a. These are known as the double-angle and half-angle formulas.

A bisector is a ray or segment which cuts an angle in half.

15 degrees is not a special angle, but it is half of 30, which is a special angle. If you need sin 15 you can use the half angle formula with 30 degrees.

A straight angle is 180 degrees so half of that is 90 degrees of a right angle.

Angle Bisector.

Angle bisector

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An angle bisector is a line that divides an angle in half.

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It will be half the original angle.

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*half 90 degrees An Acute angle.

Answer: Angle bisector

Yes, any angle less than 90 degrees is acute. Therefore, half of a right angle (half of 90 degrees) would be 45 degrees, making it acute.

A 45 degree angle is half of a right angle (90 degrees)

An "Angle Bisector"

They are half the original angle, whatever that was.

A 45 degree (Acute) angle.

A right angle is 90 degrees, so 45 degrees is half a right angle turn.

The half angle formula is: sin theta/2 = ± sqrt (1 - cos theta/2)

A straight angle is a half circle.

a right angle is half of a straight angle