Teacher2Teacher 
Q&A #193 
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From: Loyd <loydlin@aol.com> To: Teacher2Teacher Public Discussion Date: 2003070916:32:28 Subject: Re: trigonometry ratios On 2003070912:52:33, Jennie Alinea wrote: >i just want to know how to find the missing length of a right triangle >if the given part is only one? > One thing is not enough. You already know one thing when it is a right triangle. The angle opposite the hypotenuse is 90 degrees. Knowing two more things can lead to a solution. The rules you may have learned in geometry also apply here: Knowing two sides and an included angle (Side Angle Side or SAS) works. Of course the included angle is 90 degrees. The Pythagorean theorem applies in a right triangle. If you knew a triangle was a right triangle and only knew one other side, you would still not know what the other sides and angles are.
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