BPT Theorem (Basic Proportionality Theorem)
or Thale’s Theorem – Theorem no 6.1
Theorem 6.1 is : If a line is drawn parallel to one side of a triangle intersecting the other two sides. Then it divides the two sides in the same ratio.
BPT Theorem or Thale’s Theorem detailed step-by-step explanation is given in the below image and YouTube video.