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Question

A regular triangle and a regular hexagon have equal areas. What is the ratio of their sides?

This question was previously asked in
SSC CGL 2025 Tier 2 Paper 1 Question Paper (19-Jan-2026)
The correct answer is
$\sqrt{6}:1$

Ratio of Sides for Equal Area Shapes

We need to determine the ratio between the side length of a regular triangle and a regular hexagon when their areas are identical.

Key Formulas

  • The area ($A_t$) of a regular triangle with side length '$s_t$' is given by:

    $ A_t = \frac{\sqrt{3}}{4} s_t^2 $

  • The area ($A_h$) of a regular hexagon with side length '$s_h$' is given by:

    $ A_h = \frac{3\sqrt{3}}{2} s_h^2 $

Calculating the Side Ratio

The problem states that the areas are equal ($A_t = A_h$). Let's set the formulas equal to each other:

$ \frac{\sqrt{3}}{4} s_t^2 = \frac{3\sqrt{3}}{2} s_h^2 $

Now, we solve for the ratio $\frac{s_t}{s_h}$:

  1. Cancel out $\sqrt{3}$ from both sides:

    $ \frac{1}{4} s_t^2 = \frac{3}{2} s_h^2 $

  2. Multiply both sides by 4 to isolate $s_t^2$:

    $ s_t^2 = 4 \times \frac{3}{2} s_h^2 $

    $ s_t^2 = 6 s_h^2 $

  3. Divide both sides by $s_h^2$ to get the ratio of the squares of the sides:

    $ \frac{s_t^2}{s_h^2} = 6 $

  4. Take the square root of both sides to find the ratio of the sides:

    $ \frac{s_t}{s_h} = \sqrt{6} $

Therefore, the ratio of the side of the regular triangle to the side of the regular hexagon is $\sqrt{6}:1$.

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Similar Questions

  1. A regular polygon has each interior angle measuring 150°. Find the number of its sides.

  2. If the perimeter of a regular octagon is 80 cm, what is the side length?

  3. The ratio of areas of two regular polygons with same number of sides is 4:9. What is the ratio of their side lengths?


Important Questions from Plane Figures

  1. If the area of a square is 625 cm 2, then what is the perimeter of the square?

  2. The perimeter of a semi circle is 25.7 cm. What is its diameter (in cm)? (π = 3.14)

  3. The area of an isosceles right angled triangle is 121 cm 2. Find its hypotenuse.

  4. In Δ ABC, length of perpendicular from A to BC is 15 cm and BC = 8 cm and AC = 24 cm,  then find the length of perpendicular from B to AC.
  5. Two sides of a triangle are of length 5 cm and 1.5 cm. The length of third side of the triangle cannot be

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