* Calculate the coordinates of a vector in a 2D plane.
* Calculate the midpoint coordinates of a segment in a 2D plane.
* Calculate the distance between two points and the length of a vector in a 2D plane.
* Return the type of a triangle from three points in a 2D plane.
* Return the type of a quadrilateral from four points in a 2D plane.
- The app can use VPN service to secure network connections and protect sensitive user data.
- When using the VPN service, user data is encrypted and is not stored or shared with third parties.