Decide if the following statements are true or false. If they are true, explain how you know. If they are false, provide a counterexample. 9-58a HW eTool (Desmos). 9-58d HW eTool (Desmos). Homework Help ✎
If a quadrilateral has two sides that are parallel and two sides that are congruent, then the quadrilateral must be a parallelogram.
If the interior angles of a polygon add up to
, then the polygon must be a quadrilateral.
Review the Math Notes for information about the interior angles of polygons.
If a quadrilateral has
right angles, then the quadrilateral must be a rectangle.
If the diagonals of a quadrilateral bisect each other, then the quadrilateral must be a rhombus.