Use the diagram and follow the steps to prove the conjecture that if three parallel lines are intersected by two transversals, then they divide the transversals proportionally. ved Given: (, || || are AB DE Prove: = EF BC B. are F 1. Through any two points there is exactly one line. Draw an auxiliary line segment CD to form AACD and AFDC. Label the intersection of CD and e, as point H. 2. Using the Triangle Proportionality Theorem and AACD, what can you conclude? 3. Using the Triangle Proportionality Theorem and AFDC, what can you conclude? 4 What property of equality will justify the prove statement?

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter4: Polynomial And Rational Functions
Section4.6: Variation
Problem 16E
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Proportional Segments
Theorem
ACTIVITY
ACT
3.5
u have proved
Triangle
ortionality
Use the diagram and follow the steps to prove the conjecture that if three
parallel lines are intersected by two transversals, then they divide the
transversals proportionally.
In a
par
rem. Let's
Given: e, || & | e
1.
er if there are
portional
ships when
allel lines are
Prove: =
B
E
62
d by two
Is.
1. Through any two points there is exactly one line. Draw an
auxiliary line segment CD to form AACD and AFDC. Label
the intersection of CD and e, as point H.
2. Using the Triangle Proportionality Theorem and AACD,
what can you conclude?
3. Using the Triangle Proportionality Theorem and AFDC,
what can you conclude?
4/ What property of equality will justify the prove statement?
Because the conjecture has been demonstrated to be true, you can now
refer to it as a theorem. The Proportional Segments Theorem states:
"If three parallel lines intersect two transversals, then they divide the
transversals proportionally."
Transcribed Image Text:Proportional Segments Theorem ACTIVITY ACT 3.5 u have proved Triangle ortionality Use the diagram and follow the steps to prove the conjecture that if three parallel lines are intersected by two transversals, then they divide the transversals proportionally. In a par rem. Let's Given: e, || & | e 1. er if there are portional ships when allel lines are Prove: = B E 62 d by two Is. 1. Through any two points there is exactly one line. Draw an auxiliary line segment CD to form AACD and AFDC. Label the intersection of CD and e, as point H. 2. Using the Triangle Proportionality Theorem and AACD, what can you conclude? 3. Using the Triangle Proportionality Theorem and AFDC, what can you conclude? 4/ What property of equality will justify the prove statement? Because the conjecture has been demonstrated to be true, you can now refer to it as a theorem. The Proportional Segments Theorem states: "If three parallel lines intersect two transversals, then they divide the transversals proportionally."
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