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Question from Nazrul, a teacher:

ABC is a triangle , D is the mid point of AB and DE is parallel to BC where E lies on AC. How can I prove that E is the mid point of AC.
Thank you for answering my previous question.

Nazrul,

triangle

DE is parallel to BC. What does that tell you about angles ADE and ABC? What does that tell you about triangle ADE and ABC?

Penny

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