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Riya is constructing quadrilateral ABCD with AB = 5 cm, BC = 4 cm, CD = 6 cm, DA = 5 cm and diagonal AC = 7 cm.
She begins by drawing triangle ABC.
Which three lengths form this first triangle?

Class 8Constructing QuadrilateralsGeometry
  • AAB, BC and CA
  • BAB, CD and DA
  • CBC, CD and AC
  • DAB, AC and CD

Step-by-Step Solution

Diagonal AC splits ABCD into triangles ABC and ACD. Triangle ABC uses sides AB = 5, BC = 4 and the diagonal CA = 7. So those three form the first triangle.
Answer: A) AB, BC and CA

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