Chapter 5: 1QA (page 166)
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Chapter 5: 1QA (page 166)
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The quadrilaterals numbered 1, 2, 3, 4, and 5 are parallelograms. If you wanted to show that quadrilateral 6 is also a parallelogram, which of the five methods listed on page 172 would be easiest to use?

Must quad. EFGH be a parallelogram? Can it be a parallelogram? Explain.

For exercises, 14-18 write paragraph proofs.
Given: parallelogram ABCD; W, X, Y, Z are midpoints of , , and .
Prove: role="math" localid="1637745814874" is a parallelogram.
Draw and label a diagram. List what is given and what is to be proved. Then write a two-column proof of the theorem.
Theorem 5-7.
Given: ABCDis a
Prove: localid="1637661691185"

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