You know the vertices so you can easily get the linear equations [call them y1=, y2= and y3=] for the three lines that contain each side of the triangle.
[Method caveat: begin with a point known to be OUTSIDE the triangle. Find the line equation y4= from that outside point to the point you...
Systems Dynamics
Cyrus:
In Systems Dynamics 101, any system can be described using equations whereby an EFFORT variable induces a FLOW variable. These equations are usually only to 2nd order (2nd derivative.)
Some examples: Electrical voltage induces a current; current is affected by...