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One angle of a rhombus is 60° and each side is 10 cm. How long is the shorter diagonal?

Competition practiceGeometry
  • A10 cm
  • B10√3 cm
  • C5 cm
  • D20 cm

Step-by-Step Solution

The shorter diagonal cuts the rhombus into two triangles with two sides of 10 cm and a 60° angle between them, which are equilateral. So the shorter diagonal is 10 cm.
Answer: A) 10 cm

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