Find if a point is inside or outside of a triangle
Triangle coordinates Triangle lines equations Test point
ax ay y = x + px py
bx by y = x +
cx cy y = x +
Point location:
Find if a point is inside or outside of a circle
Circle equation: ( x - )2 + ( y - )2 =
x2 + y2 + x + y + = 0
Test point (x ,y): ( , )
Point location: