# How to Calculate a Complementary Angle?

A complementary angle is an angle that adds up to 90 degrees with another angle. For example, if one angle measures 30 degrees, then its complementary angle is 60 degrees. A 90-degree angle is also...
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http://www.ehow.com/how_8372321_calculate-complementary-angle.html

## How to Calculate Complementary Colors?

Simply put, complementary colors are exact opposites of each other. When placed side by side, the colors contrast and both appear to be more vibrant. This effect is very appealing to the human eye ...
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http://www.ehow.com/how_6563992_calculate-complementary-colors.html

## How to Calculate An Angle Tangent?

The tangent is used to determine the angle within a triangle by using the ratios of two sides. In right triangles, the three sides are the hypotenuse, the opposite side and the adjacent side. The h...
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http://www.ehow.com/how_8224699_calculate-angle-tangent.html

## How to Calculate a Slope Angle?

The steepness of a line, which is measured by its slope, forms an angle relative to the x-axis of a coordinate plane. A positive slope creates a positive angle of elevation, while a negative slope ...
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http://www.ehow.com/how_8219283_calculate-slope-angle.html

## How to Calculate Forces at an Angle?

In most physics problems, forces interact on a body. Unfortunately, most of this forces are applied into the body at an angle, which makes them difficult to work with. Being able to decompose these...
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http://www.ehow.com/how_8222375_calculate-forces-angle.html