Rhombus Diagonals Calculator (d₂ = 2A/d₁)

The calculator applies the exact formula d₂ = 2A/d₁, s = ½·√(d₁² + d₂²). Worked example: A = 48 cm², d₁ = 12 cm → d₂ = 8 cm, s = 7.21 cm. Keep every input in one unit system and the result follows in length units (m, ft, cm); full precision is kept until the final rounding.

1. 1

   Enter the measurements

   Type the values required by the formula for rhombus diagonals.

2. 2

   Check the units

   One unit system throughout — cm, m, ft or in.

3. 3

   Read the result

   The calculator substitutes, evaluates and rounds only at the end.

• 1

  Diagonals split polygons into triangles

• 2

  Count diagonals with n(n−3)/2 before measuring

• 3

  Longer diagonal means flatter shape — sanity check

• Counting sides as diagonals

• Using the wrong vertex skip k in dₖ = 2R·sin(kπ/n)

• Assuming diagonals equal in non-square shapes