Question -
Answer -
Given: CD || EF
тИа FEC + тИаECD = 180┬░
[Sum of co-interior anglesis supplementary to each other]
=> тИаECD =180┬░ тАУ 130┬░ = 50┬░
Also, BA || CD
=> тИаBAC = тИаACD = 70┬░
[Alternative angles ofparallel lines are equal]
But, тИаACE + тИаECD =70┬░
=> тИаACE =70┬░ тАФ 50┬░ = 20┬░