This site, which is provided for by the University of St. Andrews, contains information on the mathematician Gregory and his accomplishments.

Online calculator to calculate the surface area of geometric solids including a capsule, cone, frustum, cube, cylinder, hemisphere, pyramid, rectangular prism, sphere, spherical cap, and triangular prism

A basic review of circles and how to calculate the circumference, radius, diameter, and area. Includes practice questions.

Mini-lesson takes a look at the definition and shape of a cylinder, cylinder formula, cylinder volume, and cylinder surface area. Try your hand at the cylinder surface area calculator and interactive questions for better understanding.