6 3 proving that a quadrilateral is a parallelogram answers

Asked by admin @ 05/11/2021 in Mathematics viewed by 273 People

Which of the following are NOT sufficient to prove that a quadrilateral is a parallelogram?

I. Two pairs of opposite angles congruent.
II. A pair of adjacent angles are supplementary.
III. Both pairs of opposite sides are congruent.
IV. A pair of opposite angles congruent and a pair of opposite sides congruent.
V. Both pairs of opposite sides are parallel.
VI. A pair of opposite sides parallel and the other pair of opposite sides congruent.
VII. One pair of opposite sides are both parallel and congruent.
VIII. The diagonals bisect each other.

Answered by admin @ 05/11/2021

The answers are
I. Two pairs of opposite angles congruent.
II. A pair of adjacent angles are supplementary.

VIII. The diagonals bisect each other.

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