4 years ago

HELP!!!! Remind me to show proof of the triangle proportionality theorem

Mathematics

1 answer:

Nimfa-mama [501]4 years ago

4 0

1. KL || MN given

2. angle JKL cog angle JMN and angle JLK cong JNM These are corresponding angles on a traversal of parallel lines.

3. Triangle JKL similar to triangle JMN angle angle similarlity

4. JM/JK = JN/JL Proportionality of corresponding parts of similar triangles

5. JM=JK+KM and JN=JL+LN Collinear segment addition postulate

6. (JK+KM)/JK = (JL+LN)/JL Substitution

7. ... addition of fractinos

8. ... simplify

9. KM/JK = LN/JL Simplify (or Subtraction something)

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