1.

Kindly solve this:-​

Answer»

BA || ED and BC is a TRANSVERSAL,

.: ANGLE EGB = angle ABC (ALTERNATE ANGLES)

BC || EF and DE is a transversal,

.: angle DEF + angle EGB = 180°(c.o. interior angle)

=> angle DEF + angle ABC = 180°(angle EGB = angle ABC)

OR angle ABC and DEF are SUPPLEMENTARY.


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