If the area of a rhombus is 72 cm² and one diagonal is 12 cm, what is the length

Practice Questions

Q1
If the area of a rhombus is 72 cm² and one diagonal is 12 cm, what is the length of the other diagonal?
  1. 12 cm
  2. 18 cm
  3. 24 cm
  4. 30 cm

Questions & Step-by-Step Solutions

If the area of a rhombus is 72 cm² and one diagonal is 12 cm, what is the length of the other diagonal?
  • Step 1: Write down the formula for the area of a rhombus, which is Area = (d1 × d2) / 2.
  • Step 2: Substitute the known values into the formula. We know the area is 72 cm² and one diagonal (d1) is 12 cm.
  • Step 3: The equation now looks like this: 72 = (12 × d2) / 2.
  • Step 4: To eliminate the fraction, multiply both sides of the equation by 2. This gives us: 144 = 12 × d2.
  • Step 5: Now, to find d2, divide both sides by 12. This gives us: d2 = 144 / 12.
  • Step 6: Calculate the division: d2 = 12 cm.
  • Area of a Rhombus – The area of a rhombus can be calculated using the formula Area = (d1 × d2) / 2, where d1 and d2 are the lengths of the diagonals.
  • Diagonals of a Rhombus – In a rhombus, the diagonals bisect each other at right angles, and knowing one diagonal allows for the calculation of the other when the area is known.
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