Answer to Question #282781 in Math for Lejanie

Question

4. Which of the following biconditionals are equivalences?

a. She is his wife, if and only if he is her husband.

b. She is his mother, if and only if he is her son.

c. A is the mother of B, if and only if B is a son of A.

d. A is the father of B, if and only if B is a son of A.

e.A necessary and sufficient condition that the two triangles be similar, is that two angles of one be respectively congruent to two angles of the other.

f. A necessary and sufficient condition that two quadrilaterals be similar is that the four angles of one be respectively congruent to the four angles of the other.