We are given a circle divided into three sections with angles $100^\circ$, $140^\circ$, and $g$. We need to find the value of angle $g$.

1. Problem Description

We are given a circle divided into three sections with angles $100^\circ$, $140^\circ$, and $g$. We need to find the value of angle $g$.

2. Solution Steps

The sum of angles in a circle is $360^\circ$.

Therefore, we have the equation:

$100^\circ + 140^\circ + g = 360^\circ$

$240^\circ + g = 360^\circ$

$g = 360^\circ - 240^\circ$

$g = 120^\circ$

3. Final Answer

$120^\circ$