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While constructing quadrilateral ABCD with 2 sides and 3 angles, Kunal finds that angle A + angle B + angle C = 290°.
For the construction to close into a valid quadrilateral, what must angle D be?

Class 8Constructing QuadrilateralsGeometry
  • A140
  • B63
  • C70
  • D77

Step-by-Step Solution

Angles sum to 360°. angle D = 360 - 290 = 70°. If the rays did not meet to give 70°, the figure would not close.
Answer: C) 70

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