Idea of Approximately Equal Icon
The icon for approximately equal is shown as two wavy lines. The lines are horizontal in nature, with one line placed directly on top of the other. These lines are equal in length.
This Approximately Equal icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 6,100 icons, all in the same style and quality.