Regular Square (4 sides) — free printable diagram

How many sides does a square have?

A square is a four-sided shape — a polygon with 4 sides and 4 corners. A square has 4 equal sides and 4 equal angles of 90°.

Sides

4

Vertices (corners)

4

Interior angles add up to

360°

Each interior angle (regular)

90°

Each exterior angle (regular)

90°

Diagonals

2

Lines of symmetry (regular)

4

Also called

four-sided figure, four-sided polygon

• The interior angles of any square add up to (4 − 2) × 180° = 360°.
• A square has every angle the same, so each one measures 360° ÷ 4 = 90°.
• A square has 2 diagonals — 4 × (4 − 3) ÷ 2.