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The bisectors of angle A and angle B of parallelogram ABCD meet at point P.
What is the measure of angle APB (in degrees)?

Class 9Properties of a ParallelogramGeometry — Quadrilaterals
  • A90
  • B99
  • C81
  • D180

Step-by-Step Solution

. In triangle APB, angle PAB + angle PBA = . So angle APB = 180 - 90 = 90°.
Answer: A) 90

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