Show that AB parallel EF
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given = angle ABC =70°and angle BCE =30° ,angle ECD = 40°
Prove : AB || EF
Proof : angle ABC = angle BCE + angle ECD ......( by alternate angle )
70° = 30° + 40°
70° = 70°
hence , line AB || EF ....( by alternate angle test)
Prove : AB || EF
Proof : angle ABC = angle BCE + angle ECD ......( by alternate angle )
70° = 30° + 40°
70° = 70°
hence , line AB || EF ....( by alternate angle test)
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