Chapter 5: Q1. (page 200)
Given two parallel linesand, how many planes containand?
Short Answer
The number of planes containsandis one.
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Chapter 5: Q1. (page 200)
Given two parallel linesand, how many planes containand?
The number of planes containsandis one.
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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.

M, N and T are the midpoints of the sides of .

If , then
For exercises, 14-18 write paragraph proofs.

Given: parallelogram ABCD, M and N are the midpoints of and .
Prove: AMCN is a parallelogram.
Each figure in Exercises 19-24 is a parallelogram with its diagonals drawn. Find the values of x and y.

Prove Theorem 5-2. (Draw and label a diagram. List what is given and what is to be proved.)
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