Question

नीचे की आकृति में यदि AB || DE तो कोण BCD का मान निकालें।​

Answer 1

Step-by-step explanation:

Draw XY || AB

now, ABC = 100° therefore BCY = 100° (alternate angles)

also DCE=120° therefore DCX = 120°

now, XCB = 180° - BCY = 180° - 100°

therefore XCB = 80°

also BCD = DCX - XCB

therefore BCD = 120° - 80° = 40°