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Rhombus ABCD has side 7 cm and ∠ABC = 60°. Find the diagonal AC.

Class 9Rectangle, Rhombus and SquareGeometry — Quadrilaterals
  • A14 cm
  • B7 cm
  • C7√3 cm
  • D3.5 cm

Step-by-Step Solution

AB = BC and ∠B = 60°, so △ABC is equilateral and AC = 7 cm. (7√3 cm is the longer diagonal BD.)
Answer: B) 7 cm

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