Two adjacent sides of a rectangle, as segments meeting at a corner

Example · Elementary

Terms

Term	This example	Why
right angle	✓	The angle at the corner of a rectangle where two adjacent sides meet is a right angle, because every angle of a rectangle measures $90^\circ$.
perpendicular	✓	Two adjacent sides of a rectangle are perpendicular, because the sides meet at the corner and form a right angle there.

Distinctions using this example

• Right angle vs. perpendicular vs. orthogonal vs. normal

All examples · All distinctions · All definitions