document.write( "Question 1206650: △ABC with m∠A = m∠B = 45° and
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Algebra.Com's Answer #844205 by ikleyn(52793) $\"\"$ $\"About$

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document.write( "This triangle has two base angle congruent, A and B, so, the triangle is isosceles.\r\n" );
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document.write( "Two angles are 45° each - hence, the third angle, C,  is  180° - 45° - 45° = 90°.\r\n" );
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document.write( "Thus the triangle is a right-angled isosceles triangle with lateral sides AC and BC.\r\n" );
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document.write( "Since AC = BC = 4 cm,  we have then  AB =  =   (Pythagoras).\r\n" );
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document.write( "ANSWER.  AB =  = 5.656854249  (approximately).\r\n" );
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