Unit of area in the metric system. It is the area of a square with sides measuring 10 metres. Example

A part of any curve, but most often used to mean a part of a circle. Example

The area between two concentric circles. Example

The space between two straight lines with a common end point (vertex). Example

Height. How high something is above the surface of the Earth, sea level or horizon. Altitude is the length of perpendicular height from base to… Read More »Altitude

A rule for solving a problem in a certain number of steps. Every step is clearly described. Examples

In algebra we use numerals, symbols and letters called variables or pronumerals, and combinations of both. They stand for the unknown values. Examples

Lay, place in a straight line. Example

Positioned next to each other, having a common point or side. Example