The Jurong East CC has a stage banner in the shape of a parallelogram ABCD. Angle DAB = 65°. What is angle ABC?
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Worked Solution
Step 1: Recall the property — in a parallelogram, co-interior (adjacent) angles add up to 180°.
Step 2: Angle DAB + Angle ABC = 180°
Step 3: 65° + Angle ABC = 180°
Step 4: Angle ABC = 180° − 65° = 115°
Answer: 115°
Correct answer: 115°
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