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7 would be 70 as 180-110 because the total angle between C and D is 180. The angle 5 would be equal to 8 as it is the opposite of it and same with angle 6. B and C creates a Z so angle 4 and 5 would be equal which is 110. while 3 would be 70 as 180-110. the opposite angles are always equal in this case.
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Although I have ordered the angles this way, I'd suggest you read the following from bottom to top(∠7 to ∠1 ) as that is how I worked them all out and the reasons I gave would probably make sense that way.
∠1=110° as it is vertically opposite to ∠4
∠2=70° as it is vertically opposite to ∠3
∠3=70° as it is a corresponding angle to ∠7
∠4=110° as it is a corresponding angle to ∠8
∠5= 110° as it is vertically opposite to ∠8
∠6=70° as CD is a straight line and 180-110=70
∠7=70° as it is vertically opposite to ∠6
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