document.write( "Question 852223: Isosceles triangle ABC
\n" ); document.write( "AB = 5cm
\n" ); document.write( "BC=AC
\n" ); document.write( "A = 70 degrees = B
\n" ); document.write( "Work out the degrees of the remaining angles and the length of the other sides of the triangle
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Algebra.Com's Answer #513245 by stanbon(75887)\"\" \"About 
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Isosceles triangle ABC
\n" ); document.write( "AB = 5cm
\n" ); document.write( "BC=AC
\n" ); document.write( "A = 70 degrees = B
\n" ); document.write( "Work out the degrees of the remaining angles and the length of the other sides of the triangle
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\n" ); document.write( "Draw the figure and label the parts.
\n" ); document.write( "Since angle A = angle B = 70, angle C = 40 degrees
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\n" ); document.write( "So AB = 5 cm, and AB is opposite C.
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\n" ); document.write( "Draw a perpendicular bisector from C to AB.
\n" ); document.write( "That creates 2 right triangles.
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\n" ); document.write( "Base of the right triangle is (1/2)5 = 2.5 cm
\n" ); document.write( "The base angle is 70 degrees.
\n" ); document.write( "The height of the perpendicular bisector is 2.5*tan(70) = 6.87
\n" ); document.write( "------
\n" ); document.write( "The hypotenuse = 6.87/sin(70) = 7.31 cm = AC
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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