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∠EDF= ∠ADC= 75º             opposite angles of  two straight lines equal.

∠ABC= ∠ADC= 75º             opposite angles of parallelogram equal

(1) is the answer.

 

 

 ∠f= 40º + 36º = 76º            exterior angles equal sum of interior opposite angles of triangle

(4) is the answer

0 Replies 2 Likes ✔Accepted Answer