Question

Rewrite the definition of the term as a biconditional statement.

Two angles are verticals angles when their sides form two pairs of opposite rays.

a. If an angle is vertical to the other angle, then the angles do not form pairs of opposite rays.

b. If two angles are vertical, then their sides form two pairs of opposite rays.

c. An angle is vertical to another angle if and only if the angles do not form pairs of opposite rays.

d. Two angles are vertical angles if and only if their sides form two pairs of opposite rays.

Answer 1

d. Two angles are vertical angles if and only if their sides form two pairs of opposite rays.

Explanation:

In the given definition, a biconditional can be created by replacing "when" with "if and only if." Doing that gives you the statement of choice D:

Two angles are vertical angles if and only if their sides form two pairs of opposite rays.