Geometry concepts are briefly discussed at this site, including volume of a cylinder, parallelograms, circles, trapezoids, and triangles. Sample problems and applications are included for practice.

[Free Registration/Login Required] In this instructional activity, young scholars build geometric models of graduation caps using stiff paper. The activity requires the application of skills in finding surface area, understanding...

Calculate certain variables of a rhombus depending on the inputs provided. Calculations include side lengths, corner angles, diagonals, height, perimeter, and area of a rhombus.

Learn about the properties of 2-D shapes: circles, triangles, polygons, and quadrilaterals. Includes information, video, and examples about each, with games and quizzes for reinforcement.

MathWorld provides multiple definitions and formulas for the mathematical term, square.

Brush up on your math skills relating to trapezoids then try some practice problems to test your understanding.

Brush up on your math skills relating to rectangles then try some practice problems to test your understanding.

Brush up on your math skills relating to rhombuses then try some practice problems to test your understanding.

Find a quick, concise explanation of a rhombus. An example is given and clearly explained.