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Chapter 3: Q16 (page 75)
Complete each statement with the word always, sometimes, or never.Two parallel lines are
coplanar.
Two parallel lines are always coplanar.
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Draw a triangle that satisfies the conditions stated. If no triangle can satisfy the conditions, write not possible.
2. a. An acute scalene triangle.
b. A right scalene triangle.
c. An obtuse scalene 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 a triangle has two congruent angles, then the sides opposite those angles are congruent.
A polygon has 102 sides. What is the interior angle sum? The exterior angle sum?
Complete each statement with the word always, sometimes, or never.
Two planes parallel to the same line are parallel to each other
Complete each statement with the word always, sometimes, or never.
2. If a line is perpendicular to one of two parallel lines, then it is perpendicular to the other one.
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