document.write( "Question 1198347: Determine whether it is possible to draw a triangle
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document.write( " given each set of information. Sketch all possible
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document.write( " triangles where appropriate. Calculate, then label, all
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document.write( " side lengths to the nearest tenth of a centimetre and
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document.write( " all angles to the nearest degree.
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document.write( "b=12.2cm, c=8.2cm, AngleC=34 \n" );
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Algebra.Com's Answer #831934 by math_tutor2020(3817)![]() ![]() ![]() You can put this solution on YOUR website! \n" ); document.write( "Let's see if we can use the Law of Sines to determine angle B. \n" ); document.write( "sin(B)/b = sin(C)/c \n" ); document.write( "sin(B)/12.2 = sin(34)/8.2 \n" ); document.write( "sin(B) = 12.2*sin(34)/8.2 \n" ); document.write( "sin(B) = 0.8319699 \n" ); document.write( "B = arcsin(0.8319699) or B = 180-arcsin(0.8319699) \n" ); document.write( "B = 56.3016 or B = 123.6984 \n" ); document.write( "These values are approximate.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "If B = 56.3016, then \n" ); document.write( "A+B+C = 180 \n" ); document.write( "A = 180-B-C \n" ); document.write( "A = 180-56.3016-34 \n" ); document.write( "A = 89.6984 \n" ); document.write( "which is a valid angle measure since 0 < A < 180.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "If B = 123.6984, then \n" ); document.write( "A+B+C = 180 \n" ); document.write( "A = 180-B-C \n" ); document.write( "A = 180-123.6984-34 \n" ); document.write( "A = 22.3016 \n" ); document.write( "which is also valid.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "We have the SSA ambiguous case here, where we have 2 possible triangles. \n" ); document.write( " ![]() \n" ); document.write( "Angle A could be 22.3016° marked in blue, or it could be 89.6984° marked in red. \n" ); document.write( "B1 and B2 represent possible locations for point B. \n" ); document.write( "Here's what it looks like to split the triangles up, to get a better look at them. \n" ); document.write( " ![]() \n" ); document.write( "I've also erased the \"1\" and \"2\" from \"B1\" and \"B2\" respectively.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "I'll let you use the law of sines to determine the missing side for each possible triangle. \n" ); document.write( "I'll also let you round the angle measures to the nearest whole degree. \n" ); document.write( " \n" ); document.write( " |