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6:54
Khan Academy
Khan Academy
Basic Proportionality Theorem
In this video, we begin with a hands-on activity to intuitively explore the Basic Proportionality Theorem (BPT), also known as Thales’ Theorem. Using simple materials and visual setups, we experimentally verify how a line drawn parallel to one side of a triangle divides the other two sides in the same ratio. Once the concept feels concrete ...
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