Chapter 5: Q1 (page 199)
Complete the following statement with the word always, sometimes, or never.
A square is ___ a rectangle.
Short Answer
A square is always a rectangle.
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Chapter 5: Q1 (page 199)
Complete the following statement with the word always, sometimes, or never.
A square is ___ a rectangle.
A square is always a rectangle.
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Study the markings on each figure and decide whether ABCD must be a parallelogram. If the answer is yes, state the definition or theorem that applies.

The coordinates of three vertices of parallelogram ABCD are given. Plot the points and find the coordinates of the fourth vertex.
Prove: If a segment whose endpoints lie on opposite sides of a parallelogram passes though the midpoint of a diagonal, that segment is bisected by the diagonal.
Quadrilateral ABCD is a parallelogram. Name the principal theorem or definition that justifies the statement.

Prove Theorem .
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