A right triangle has an angle that measures 34, and the adjacent side measures 17. What is the length of the hypotenuse to the nearest tenth?
20.5
25.2
30.4

Question

A right triangle has an angle that measures 34, and the adjacent side measures 17. What is the length of the hypotenuse to the nearest tenth?  
20.5
25.2
30.4<--
34

phi · Answer

I assume this is trig.  What formula did you use ?

anonymous · Answer

Yes it is trig -.- I tried  co sine , I really guessed I wasn't sure on which to use. I decided 30.4 seemed like the best answer

phi · Answer

Draw a right triangle
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now put in the numbers

phi · Answer

Let's label one of the angles  34º
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phi · Answer

next put in this info:
 the adjacent side measures 17.
which side is the adjacent side to 34º angle ?

phi · Answer

remember, there are 3 sides:  they hypotenuse  (opposite the 90 angle)
the opposite side and the adjacent side

anonymous · Answer

oh silly me it's 20.5

phi · Answer

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phi · Answer

cos(34)= 17/x  

or
x= 17/cos(34)