document.write( "Question 1111632: Angle θ is an acute angle in a right triangle.If m∠θ=31∘ and the side adjacent toθ has length 13, how long is the hypotenuse? \n" ); document.write( "
Algebra.Com's Answer #726655 by Alan3354(69443)\"\" \"About 
You can put this solution on YOUR website!
Both angles are acute in a right triangle, no need to mention that. Plus, it's 31º, which is acute.
\n" ); document.write( "----
\n" ); document.write( "cos(31) = 13/hypotenuse
\n" ); document.write( "
\n" ); document.write( "
\n" );