Which statement is a proper biconditional statement formed from the conditional statement: a) If an angle is bisected, then it is divided into two congruent angles.
b)if an angle is not bisected, then it is not divided into two congruent angles.
c)If an angle is not divided into two congruent angles, then it is not bisected.
d)If an angle is divided into two congruent angles, then it is bisected.
e)An angle is bisected if, and only if, it is divided into two congruent angles.

17. a researcher measures three variables, x, y, and z for each individual in a sample of n = 20. the pearson correlations for this sample are rxy = 0.6, rxz = 0.4, and ryz = 0.7. a. find the partial correlation between x and y, holding z constant. b. find the partial correlation between x and z, holding y constant. (hint: simply switch the labels for the variables y and z to correspond with the labels in the equation.) gravetter, frederick j. statistics for the behavioral sciences (p. 526). cengage learning. kindle edition.