# How to Calculate the Arc & Angles of a Circle?

An arc is any segment of a circle. The length of an arc is difficult to measure because of the circle's curvature but can be calculated using the mathematical relationships within the circle. The l...
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http://www.ehow.com/how_8380212_calculate-arc-angles-circle.html

## How many angles does a circle have?

A circle has infinite possible angles. You can form an angle in a circle by using three points: the center of the circle and any two points along the circle's circumference. Since you can plot infi...
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http://www.answerbag.com/q_view/2038267

## How to Calculate Sun Angles?

There are two basic ways to measure the angle of the sun from the horizon. The first is only accurate on a solstice or equinox date, and is based on the relationship of the latitude at your locatio...
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http://www.ehow.com/how_8346186_calculate-sun-angles.html

## How to Calculate Angles Without a Protractor?

A protractor is required to directly calculate the measure of an angle, but you can use geometric properties of triangles to make an indirect measure of the angle. Use the sine formula to infer the...
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http://www.ehow.com/how_8143890_calculate-angles-protractor.html

## How to Calculate Missing Angles?

Polygons are closed shapes with any number of sides. For example, a triangle is a three-sided polygon, while a pentagon is a five-sided polygon. The measure of the interior angles of a polygon depe...
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http://www.ehow.com/how_6454211_calculate-missing-angles.html