**Construct the Orthocenter
of a Mid-segment Triangle.**

**Construct the Center
of the Nine-Point Circle of a Triangle**

**Construct the Nine-point
Circle**

**Construct an Equilateral
Triangle Given a Side**

**Construct an Isosceles
Triangle Given the Base and Altitude**

**Construct the Triangle
Centers H, G, C, and I**

**Construct
the Triangle Centers with the Euler Line**

**Construct a Hexagon Given a Side**

**Construct an Octagon Given a Side**

**Construct a Pentagon Given a Side**

**Construct a Pentagon Given the Radius**