This site from Math World describes the altitude of a triangle, and shows how to find these altitudes using the parameter and positions of the vertexes and angles of the triangle. The site gives other interesting formulas involving the...

This lesson will demonstrate how to use slope, midpoint, and distance formulas to determine from the coordinates of the vertices if a quadrilateral is an isosceles trapezoid in a coordinate plane. It is 3 of 5 in the series titled...

This lesson will demonstrate how to use slope, midpoint, and distance formulas to determine from the coordinates of the vertices if a quadrilateral is a parallelogram in a coordinate plane. It is 1 of 6 in the series titled "Coordinate...

This lesson will demonstrate how to use slope, midpoint, and distance formulas to determine from the coordinates of the vertices if a quadrilateral is a rectangle in a coordinate plane. It is 4 of 5 in the series titled "Coordinate...

This lesson will demonstrate how to use slope, midpoint, and distance formulas to determine, from the coordinates of the vertices if a quadrilateral, if the shape is a square in a coordinate plane. It is 2 of 2 in the series titled...

A brief overview on calculating various measures of segments, like focus to vertex and vertex to directix, is given. Additionally, equations of parabolas in general, standard, and vertex forms are listed.

In this activity, students use the calculator to solve quadratic equations. They use the quadratic formula to determine the vertex and the x-intercepts of the graph of a quadratic function.

Use Euler's Formula and properties of known platonic solids' faces, edges, and vertices to determine why only five platonic solids exist.

This site from the Wikipedia encyclopedia has formulas and examples of hyperbolas. A detailed graph and several formulas and examples are given along with several links to additional information on related subjects.