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anonymous

  • 5 years ago

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.

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  1. anonymous
    • 5 years ago
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    II, VI, and VII II and VI IV and VII II, IV, and VII 3. If quadrilateral ABCD is a parallelogram, then which of the following statements must be true? A D mA + mD = 90° mA + mC = 180° mB + mC = 180° Session Complete

  2. amistre64
    • 5 years ago
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    which part are we answering?

  3. amistre64
    • 5 years ago
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    since VII is good; that leaves (b) to check as the answer

  4. anonymous
    • 5 years ago
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    uh the last part idk where it came from just the top vii and stuff

  5. amistre64
    • 5 years ago
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    (b) is not sufficient.

  6. anonymous
    • 5 years ago
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    so its b

  7. amistre64
    • 5 years ago
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    i believe its b; I know VII is good, and all the rest have VII as bad soooo....b by default and also by logic, its elements are not sufficient

  8. anonymous
    • 5 years ago
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    ur right

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