Math Facts

Among all shapes with the same perimeter, a circle has the largest area.

Also, among all shapes with the same area, a circle has the shortest perimeter.

Geometry Sections

Basics of Geometry
Reasoning and Proofs
Parallel and Perpendicular Lines
Congruent Triangles
Relationships Within Triangles
Quadrilaterals and Other Polygons
Right Triangles and Trigonometry
Circumference, Perimeter, and Area
Surface Area and Volume

Introduction to Geometry

What is geometry? Geometry is the branch of mathematics dealing with the study of properties, measurement, and relationships of points, lines, planes, surfaces, angles, and solids. (Basically, it is the study of objects and the space around those objects). It is one of the oldest branches of mathematics, and its name is derived from Greek words meaning 'Earth measurement', where 'geo = Earth' and 'metry' = 'measure'.