B. Write TRUE if the statement is correct and FALSE if it is not. Write your answers on the blank provided for 21. A triangle has three sides, three vertices and three angles. 22. The sum of the angles of a triangle is 360°. 23. A polygon with four sides, four angles and four vertices is called quadrilateral. 24. The sum of the angles of a quadrilateral is 360°. 25. An isosceles triangle has two equals sides.​