Finding missing sides and angles

In algebra, one of the most important concepts is finding missing sides and angles.

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Right Triangle Calculator

Finding the length of a side in a triangle can be done by using the relationship between sides and angles.

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Triangle Angle. Calculator

Once this length is found, all three sides of the triangle can be determined given such information.

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Finding missing sides and angles

This means that if two sides and their included angle are known, then the length of the third side of the triangle can easily be found.


For example, if you know one side is 4 cm long and its adjacent angle is 30 degrees, then you could find the side opposite this angle to have a length of 3.46 cm using trigonometric equations.

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Right Triangle Trig Missing Sides and Angles

In any triangle, two sides and their included angle determine the third side.

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