**Areas related to Circles ncert solutions Chapter 12 Exercise 12.3 Question 4**

**4.** Find the area of the shaded region, where a circular arc of radius 6 cm has been drawn with vertex O of an equilateral triangle OAB of side 12 cm as center.

**Solution**

Area of shaded portion = Area of given equilateral triangle OAB+area of sector of circle **(1)**

Area of equilateral triangle OAB = =

**(2)**

{Area of any equilateral triangle is equal to }

{Because is an equilateral triangle}

Therefore, Reflex

**Area of sector of circle **

**(3)**

Putting **(2)** and **(3)** in **(1)**, we get

**Area of Shaded portion**