solve using in a easy formula
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the answer is 90 degree
ROYBISWAJYOTI:
explain it
angle 4 is 45 degree so angle 1 also is 45 degree reason they are vertically opposite angle
angle 4 is 45 degree so angle 1 also is 45 degree reason they are vertically opposite angle
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angle 3 +angle 4=180
angle 4= angle 1
angle 4= angle 1
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