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Thale\'s thorem |
| Answer» Proportionality Theorem (Thales theorem):\xa0If a line is drawn parallel to one side of a triangle intersecting other two sides, then it divides the two sides in the same ratio.\xa0\xa0\tIn ∆ABC , if DE || BC and intersects AB in D and AC in E then\xa0 AD AE ---- = ------ DB EC\t | |