OpenStudy (anonymous):
Is the following definition of complementary reversible? If yes, write it as a true biconditional. Complementary angles are two angles whose sum measures to 90 degrees a.this statement is not reversible b.Yes, if angles are complementary, than their sum measures to 90 degrees c. Yes, angles are complementary if (and only if) their sum measures to 90 degrees d. Yes, angles are complementary if their sum measures to 90 degrees
Directrix (directrix):
If the statement is reversible, then it and its converse are simultaneously true. Such a statement is known as a biconditional. Complementary angles are two angles whose sum measures to 90 degrees could be written as: complementary angles <==> two angles whose sum measure 90 degrees. Read more about "if and only if" here here: http://www.regentsprep.org/regents/math/geometry/gp1/bicon.htm
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