Answer
Converse: In a plane, if two lines are not parallel, then these lines are not perpendicular to the same line. (true)
Inverse: In a plane, if two planes are perpendicular to the same line, then these lines are perpendicular. (true)
Contrapositive: In a plane, if two lines are parallel, then these lines are perpendicular to the same line. (true)
Work Step by Step
Switch the hypothesis and conclusion for the converse. Negate the hypothesis and conclusion for the inverse. Switch and negate the hypothesis and conclusion for the contrapositive.
