Chapter 3: Q1 (page 87)
In each exercise some information is given. Use this information to name the segments that must be parallel. If there are no such segments, write none.

Short Answer
The obtained segments areand.
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Chapter 3: Q1 (page 87)
In each exercise some information is given. Use this information to name the segments that must be parallel. If there are no such segments, write none.

The obtained segments areand.
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Complete each statement with the word always, sometimes, or never.
If two parallel lines are cut by a third plane, then the lines of intersection are _______ coplanar.
The cover of a soccer ball consists of interlocking regular pentagons and regular hexagons, as shown at the right. The second diagram shows that regular pentagons and hexagons cannot be interlocked in this pattern to tile a floor. Why not?

Draw a triangle that satisfies the conditions stated. If no triangle can satisfy the conditions, write not possible.
1. a. An acute isosceles triangle.
b. A right isosceles triangle.
c. An obtuse isosceles triangle.
Draw several diagrams to help you decide whether each statement is true or false. If it is false, show a counterexample. It is true, draw and label a diagram you could use in a proof. List, in terms of the diagram, what is given and what is to be proved. Do not write a proof.
If two triangles have equal perimeters, then they have congruent sides.
Complete each statement with the word always, sometimes, or never.Two parallel lines are coplanar.
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