document.write( "Question 432419: Find angle a of a triangle with sidec=13 and side b =12 \n" ); document.write( "
Algebra.Com's Answer #299814 by belle3833(46)\"\" \"About 
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assuming the triangle is a right-angled triangle;\r
\n" ); document.write( "\n" ); document.write( "if b is the side adjacent to angle a and c is the hypotenuse, we use the cosine ratio\r
\n" ); document.write( "\n" ); document.write( "\"cos%28theta%29=%28adjancent%29%2F%28hypotenuse%29\"\r
\n" ); document.write( "\n" ); document.write( "\"cos%28theta%29=%2812%29%2F%2813%29\"
\n" ); document.write( "\"theta=23\" to the nearest degree
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