An equilateral triangle on three lines
Construction of an equilateral triangle with a vertex on each of three parallel lines.
Prove that the construction results in an equilateral triangle, given any three parallel lines.
Constructing a Tangent
Ellipse: Reflective Property
Circumcenter (c) of a Trinagle
Math 1 Final Question #7 and #20
Centres in a Triangle
Isabelle Garand_equilateral triangle