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McGraw Hill Integrated II, 2012

MH

McGraw Hill Integrated II, 2012 View details

5. Rhombi and Squares

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Exercise 59 Page 520

What conditions must a quadrilateral satisfy to be a parallelogram?

Yes.

Practice makes perfect

To prove that a quadrilateral is a parallelogram, it is enough to show that one of the following conditions is satisfied.

Both pairs of opposite sides are parallel.
Both pairs of opposite sides are congruent.
Both pairs of opposite angles are congruent.
The diagonals bisect each other.
A pair of opposite sides is both parallel and congruent.

Let's analyze the given quadrilateral.

We can see that both pairs of opposite sides are congruent. Therefore, it is a parallelogram.

Subchapter links

Exercises p.517-520