. If AB parallel to CD Find y for the figure given below *
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Answer:
y=20 degrees
Step-by-step explanation:
- if AB // CD then take BD as transversal line
- so that angle ABD=y+2y+y=4y
- as per the theorem.... the sum of opposite interior angles is equal to 180 degrees
- angle ABD+angleCDB=180 degrees
- so 4y+5y=180degrees
- 9y=180degrees
- y=180/9
- y=20 degrees
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