← All experiments Parallel Line Ratios MODULE 03

Control Panel

D — position on AB 0.40
E — position on AC 0.40
AD / DB 0.67
AE / EC 0.67
DE is NOT parallel to BC

Live Figure

A B C D E

Slide D and E independently. Watch AD/DB and AE/EC — the moment they match exactly, DE becomes parallel to BC, no matter where that match happens to fall.