TRUE OR FALSE. Write true if the statement is true, otherwise False 20. A triangle with two congruent sides is called isosceles. a. True b. False 21. A Postulate is a statement that has to be proven before being accepted a. True b. False 22. If two lines intersect, their intersection contains only one point a. True b. False 23. If two angles are vertical angles, then they are congruent. a. True b. False 24. If two angles form a linear pair, then they are supplementary. a. True b. False 25. If two angles are supplementary to the same angle or to congruent angles, then they are congruent. a. True b. False​