(h) All squares are trapeziums. 9 years ago. 1 Answer. The opposite angles are congruent. 1. Question 548775: Which is NOT always a property of a Parallelogram? Question. SURVEY . That is true. The parallelogram has the following properties: Opposite sides are parallel by definition. Tags: Question 12 . Asked 10/8/2015 9:06:14 AM. Go with B. D. At least one pair of opposite sides is parallel and congruent. All of the angles are congruent. One has to be on the lookout for double negatives. Classify Quadrilateral as parallelogram A classic activity: have the students construct a quadrilateral and its midpoints, then create an inscribed quadrilateral. Krishnamurthy. Properties of Parallelogram. Answer Save. It is a true statement to say that all rectangles are parallelograms. Lv … Relevance. Which of the following properties is not true for all parallelograms? All sides and angles of a square are equal. Anonymous. 60 seconds . 2 Answers. Which of the following is not a property of all parallelograms? A. Sue. Property 1 : If a quadrilateral is a parallelogram, then its opposite sides are congruent. No. B. Favorite Answer. Q. 4) opposite angles are congruent. Which property is true of all parallelograms? Consecutive angles are supplementary. Relevance. D. Opposite sides are perpendicular. Solutions: (a) False. However, the statement that all parallelograms are rectangles is false. Log in for more information. C. The diagonals are perpendicular. Opposite sides of parallelogram are equal and parallel but all angles are not equal only opposite angles are equal. A. A. Diagonals that bisect each other B. Diagonals that bisect opposit angles C. Two pairs of opposite congruent sides D. Two pairs of opposite congruent angles Answer by jim_thompson5910(35256) (Show Source): 3) opposite sides are congruent. Consecutive angles are supplementary. All of the sides are congruent. (b) True. Thus all parallelograms have all the properties listed above, and conversely, if just one of these statements is true in a simple quadrilateral, then it is a parallelogram. B. Consecutive angles are congruent. Opposite sides are congruent. There is a point X in the plane of the quadrilateral with the property that every straight line through X divides the quadrilateral into two regions of equal area. 4 Answers. So, All squares are parallelograms. Opposite sides are congruent. C. Consecutive sides are parallel. The bad in Answer A is due to your teachers written grammar. Read this: The property that is NOT characteristic of a parallelogram is opposite sides are not congruent. 0 0. A quadrilateral with exactly one … Diagonals are congruent. Which property is true of all parallelograms? Relevance. A ll rectangles are not squares but a ll squares are rectangles. Then ask the students to measure the angles, sides etc.. of inscribed shape and use the measurements to classify the shape (parallelogram). Opposite angles are congruent. The properties of the parallelogram are simply those things that are true about it. 8 years ago. These properties concern its sides, angles, and diagonals. Designed with Geometer's Sketchpad in mind . answer choices . Opposite angles are congruent. The opposite sides are congruent. Get your answers by asking now. (g) All parallelograms are trapeziums. 2) consecutive angles are supplementary . Still have questions? A rectangle is a parallelogram because all of its sides are parallel, but a parallelogram is not a rectangle because it does not have all right angles. The consecutive sides are congruent. It has been illustrated in the diagram shown below. Lv 7. Answer Save. B. it … Property that is characteristic of a parallelogram is that opposite sides are congruent. 1) diagonals are congruent. 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