# Right Triangle Geometry

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This video is for the redesigned SAT which is for you if you are taking the SAT in March 2016 and beyond.

The following diagram shows trigonometry using a right triangle. Scroll down the page for more examples and solutions on using right triangle trigonometry and geometry.

How to find missing side using trigonometry?

Right Triangle Geometry — Basic example

It is given that sin(70°) = 0.9396..., cos(70°) = 0.3420..., and tan(70°) = 2.7474...
In the diagram above, ∠ABC and ∠BCD are right angles, AC || CD.
Which of the following is closest to the length of AB?
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