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Square

Square

One-page printable reference

See It in Action

Two examples of the idea done right—and one common look-alike that is not right.

EXAMPLE

EXAMPLE

NON-EXAMPLE

Definition

A parallelogram that is both a rectangle (four right angles) and a rhombus (four congruent sides).

In simple terms:

A four-sided shape with all sides equal and all corners 90°.

Example:

A standard chessboard square is a perfect square.

Important Notes:

  • Opposite sides are parallel and congruent.

  • Opposite angles are congruent (all 90°).

  • Diagonals are congruent, bisect each other, and are perpendicular.

  • All properties of rectangles and rhombuses also apply.

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Learn the whole picture

This term is one piece. Our courses build it into everything around it—short videos, practice, and the “why” behind every concept.

Algebra 1

Lines, slope, functions & more

Geometry

Shapes, proofs & spatial reasoning

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