# the square

 Basics
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## Freely usable photos

Most pictures found here can be freely reused by students and teachers.
Square rig
Square rig
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Square

In geometry, a square is a regular quadrilateral, which means that it has four equal sides and four equal angles (90-degree angles, or 100-gradian angles or right angles). It can also be defined as a rectangle in which two adjacent sides have equal length. A square with vertices ABCD would be denoted ${\displaystyle \square }$ ABCD.

## Vocabulary

the square
der Vorplatz, der Kirchplatz