document.write( "Question 70742: A triangle plot of land has sides of lengths 130ft, 110ft, and 100ft. Approximate the smallest angle between the sides. \n" ); document.write( "

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A triangle plot of land has sides of lengths 130ft, 110ft, and 100ft. Approximate the smallest angle between the sides.
\n" ); document.write( "AB=130,BC=110,CA=100
\n" ); document.write( "SMALLEST ANGLE IS OPPOSITE SMALLEST SIDE CA OF 100'= ANGLE ABC
\n" ); document.write( "AC^2=AB^2+BC^2-2AB*BC*COS(ABC)
\n" ); document.write( "COS(ABC)=[AB^2+BC^2-AC^2]/[2AB*BC]=0.664336
\n" ); document.write( "ANGLE ABC = 48.4 DEG. \n" ); document.write( "

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