Chapter 6: Q4. (page 205)
For the following conditional statement, classify the statement as true or false.
If , then .
Short Answer
The conditional statement “If , then ” is true.
Chapter 6: Q4. (page 205)
For the following conditional statement, classify the statement as true or false.
If , then .
The conditional statement “If , then ” is true.
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Get started for freeSuppose someone plans to write an indirect proof of each conditional. Write a correct first sentence of the indirect proof.
If , then
Arrange sentences (a)-(e) in an order that completes an indirect proof of the following statement: In a plane, two lines perpendicular to a third line are parallel to each other.
Given: Lines a, b and t lie in a plane;
Prove:
(a) Then a intersects b in some point Z.
(b) But this contradicts the theorem which says that there is exactly one line perpendicular to a given line through a point outside the line.
(c) It is false that a is not parallel to b, and it follows that
(d) Assume temporarily that a is not parallel to b.
(e) Then there are two lines through Z and perpendicular to t.
Write an indirect proof in paragraph form.
Given:andare equilateral;is not equilateral.
Prove: is not equilateral.
Prove that if two angles of a triangle are not congruent, then the sides opposite those angles are not congruent.
For each statement in Ex 5-10 copy and complete a table like the one shown below.
If , then .
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