document.write( "Question 115266: Find the area of the triangle ABC when c=12in, b=9in, angle A=60 degrees?\r
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document.write( "Find the area of the triangle ABC when three sides are a=9,b=12 and c=5\r
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document.write( "I need help with these, can someone show me step by step instruction thanks \n" );
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Algebra.Com's Answer #83842 by stanbon(75887) ![]() You can put this solution on YOUR website! Area = (1/2)ab(Cos(C)) \n" ); document.write( "Find the area of the triangle ABC when c=12in, b=9in, angle A=60 degrees? \n" ); document.write( "Area = (1/2)bc(Cos(A)) \n" ); document.write( "Area = (1/2)*9*12*Cos(60) \n" ); document.write( "Area = 27 sq. in \n" ); document.write( "---------------------- \n" ); document.write( " \n" ); document.write( "Find the area of the triangle ABC when three sides are a=9,b=12 and c=5 \n" ); document.write( "------------------ \n" ); document.write( "SSS Triangle Area Formula: the square root of (S(S - a)(S - b)(S - c)) where a, b, and c are sides and S is (a + b + c)/2 \n" ); document.write( "-------------------- \n" ); document.write( "S= (9+12+5)/2 = 13 \n" ); document.write( "Area = sqrt[13*(13-9)(13-12)(13-5)] \n" ); document.write( "Area = sqrt[13*4*1*8] \n" ); document.write( "Area = sqrt[416] \n" ); document.write( "Area = 20.4 sq units \n" ); document.write( "=================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |