This page provides an excellent biography of John Wallis, an English clergyman, mathematician, and philosopher. Discusses his childhood, education, travel, studies, and his contributions to the fields of philosophy, language, and...

A complete high school Precalculus Concepts course. Includes 'Related Modalities' for each lesson that teach the same concept in different ways. The text materials follows Algebra II and comes before Calculus or Statistics. The content...

Given information about the center and radius of a circle, graph it. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Given the standard form equation of a circle, graph the circle. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Find the center and radius of a circle given the equation in expanded form. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Given the expanded equation of a circle, graph the circle. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Given the graph of a circle, find its center and radius. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Find the center and radii of an ellipse from its graph, and vice versa. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Given the equation of a hyperbola, find its graph by considering its vertices and direction. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Given the graph of a circle or its features, find its standard equation. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Given the major and minor radii of an ellipse, find its foci. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Find the center and major and minor radius of an ellipse given its equation. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.