Basic Proportionality Theorem Class 10 | Thales Theorem + Proof | Maths | Letstute
What is the Basic Proportionality Theorem (BPT), also known as Thales Theorem?
In this Geometry video, Letstute explains the Basic Proportionality Theorem with its proof and 3 important properties all in a simple, logical way.
The Basic Proportionality Theorem states: when a line is drawn parallel to one side of a triangle, it divides the other two sides in equal ratio. In this session you'll learn the theorem, understand why it works through a clear proof, and see how to apply it to solve a geometry problem.
0:00 Introduction
1:23 1st property
2:24 2nd property
3:07 3rd property
3:41 solution to the geometry problem
Key takeaways:
• What the Basic Proportionality Theorem (Thales Theorem) means
• The 3 properties behind the theorem
• The full proof of BPT
• How to apply BPT to solve problems
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