FIND THE VALUE OF X
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120 ° ...........
by exterior ∠ theorem
In △ ABC
∠ ECD = ∠ A + ∠ B
you will get 30 +40=70
do the same thing in △ ECD
∠ C + ∠ D = ∠ ECD
70+50=120
x. =120
easy
120 ° ...........
by exterior ∠ theorem
In △ ABC
∠ ECD = ∠ A + ∠ B
you will get 30 +40=70
do the same thing in △ ECD
∠ C + ∠ D = ∠ ECD
70+50=120
x. =120
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