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  1. The measure of each of two opposite angles of a rhombus is 60° and the measure of one of its sides is 10cm. The length of its smaller diagonal is :
    1. 10 cm
    2. 10√3 cm
    3. 10√2 cm
    4. 5
      		√2
      2
Correct Option: A


Let AB = BC = CD = DA = 10 cm
∠BAD = ∠BCD = 60°
∴ ∠ABC = ∠ADC = 120°
and ∠CBD = ∠CDB = 60°
∴ BD = 10cm


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