Question

in the given figure show that:
CD||EF

​

Answer 1

Step-by-step explanation:

Angle AEF + Angle EAB = 180*

they form pair of supplementary angle

Therefore EF || AB

Angle DAB = Angle DAE + Angle EAB = 21 + 62 = 83

Therefore Angle DAB = Angle CDA

Therefore by converse of alternate interior angle theorem

CD || AB

since CD || AB and AB || EF

-->> CD || EF

Hence proved