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Q: What is the formula for calculating the length of a forty five degree angle?

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You can use the cosine rule to calculate the central angle.

For a circle: Arc Length= R*((2*P*A)/(360)) R being radius, P being pi (3.14159), and A being the measure of the central angle.

90 degree

That depends what you want to calculate.

The total circumference is (arc length) times (360) divided by (the angle degrees)

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You can use the cosine rule to calculate the central angle.

Angle Side Angle

This is the formula for calculating a taper: Large diameter of the taper minus the small Diameter of the taper divided by the length of of the taper will give you the taper per inch. You will also need to know the included angle of the taper if you ar cutting this taper. This formula would be Tangent of the included angle divide by 2.

For a circle: Arc Length= R*((2*P*A)/(360)) R being radius, P being pi (3.14159), and A being the measure of the central angle.

Using a protractor is the easiest formula

An angle does not have a diameter. The arms of an 82 degree angle can be as long as you like - infinite, even.

90 degree

That depends what you want to calculate.

The total circumference is (arc length) times (360) divided by (the angle degrees)

I assume your 90 degree angle is on the right and the 30 degree angle is opposite that. ( degree mode ) sin theta = opposite/hypotenuse sin 30 degrees = opp./44 = 22

It depends on the length of the other two sides which creates that angle. Not enough information was given. However, you can simply use the Cosine rule to find it if the other two lengths are known. a2=b2+c2- 2bccosA (A=30 and a is the length of the side opposite to 30 degree angle; b and c is the length of the sides which makes up the 30 degree angle)

Like a 3 sided triangle each side being of equal length -- correction -- That's a 60 degree angle!. A 45 degree angle is formed in a right-angle triangle when the other two sides are of equal length. --correction-- learn your maths!?! .....................that was mean sorry

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