Correct Answer - Option 2 : 1 ∶ 3 ∶ 2

**Given****∶**

An equilateral triangle.

**Formula** **Used**∶

Attitude of an equilateral triangle.

Inradius of the equilateral triangle.

Circumradius of the equilateral triangle.

**Calculation****∶ **

Altitude of an equilateral triangle = √3a/2

In radius of an equilateral triangle = a/2√3

Circumradius of an equilateral triangle = a/√ 3

So, the given ratio is a/2√3 ∶ √3a/2 ∶ a/√ 3

⇒ 1 ∶ 3 ∶ 2

**∴ The required ratio is **1 ∶ 3 ∶ 2.