# A point inside a triangle

How do I find out if a point is inside a two-dimensional triangle or not? To do this, the coordinates of the vertices of the triangle and the coordinates of the point must be entered into the calculator.

**The point belongs to the triangle, through the coordinates**

**A point inside a triangle**

**Coordinates of the triangle**

**Point**

**Coordinates X**

**Coordinates Y**

**A**

**B**

**C**

**Coordinates of the point**

**D**