What is the ratio of in-radius and circum-radius of an equilateral triangle?
In case of an equilateral triangle In-radius(r) = $$\frac{side}{2\sqrt{3}}$$ and circum-radius(R) = $$\frac{side}{\sqrt{3}}$$
$$\therefore$$ Ratio between them =Â $$\frac{side}{2\sqrt{3}}$$ :Â $$\frac{side}{\sqrt{3}}$$
$$\Rightarrow$$ 1:2
Hence, option A is the correct answer.
Create a FREE account and get:
