Which of the following conditions is not sufficient to prove that a quadrilateral is a parallelogram? A. Two pairs of sides are parallel. B. Two pairs of opposite sides are congruent. C. Two angles are supplementary. D. Two diagonals bisect each other. 4. What is true about the diagonals of a parallelogram? A. They are always congruent. B. They are always perpendicular. C. They always bisect each other. D. They always form four congruent angles. 5. Which of these statements is not true about parallelograms? A. Parallelograms are always quadrilateral. B. Opposite angles of a parallelogram are always supplementary. C. Diagonals of a parallelogram always intersect at a point. D. Opposite sides of a parallelogram are always parallel. 3.

Which of the following conditions is not sufficient to prove that a quadrilateral is a parallelogram? A. Two pairs of sides are parallel. B. Two pairs of opposite sides are congruent. C. Two angles are supplementary. D. Two diagonals bisect each other. 4. What is true about the diagonals of a parallelogram? A. They are always congruent. B. They are always perpendicular. C. They always bisect each other. D. They always form four congruent angles. 5. Which of these statements is not true about parallelograms? A. Parallelograms are always quadrilateral. B. Opposite angles of a parallelogram are always supplementary. C. Diagonals of a parallelogram always intersect at a point. D. Opposite sides of a parallelogram are always parallel. 3.

Elementary Geometry For College Students, 7e

7th Edition

ISBN:9781337614085

Author:Alexander, Daniel C.; Koeberlein, Geralyn M.

Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.

Chapter4: Quadrilaterals

Section4.2: The Parallelogram And Kite

Problem 20E: In Exercises 19 to 24, complete each proof. Given: Quadrilateral ABCD, with midpoints E, F, G, and H...

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