Right Angle Verification: Determining 90-Degree Angles in Geometry

A right angle is special because it measures exactly $90^\circ$! This creates perpendicular lines that meet at perfect square corners, like the corners of a rectangle.

Right angles: $90^\circ$
Acute angles: Less than $90^\circ$
Obtuse angles: Greater than $90^\circ$ but less than $180^\circ$
Straight angles: Exactly $180^\circ$

The degree symbol (°) tells us we're measuring angles, not distance or other quantities. Without it, "90" could mean anything - 90 inches, 90 apples, or 90 seconds!

Absolutely! Right angles are everywhere: book corners, door frames, picture frames, and floor tiles. They're used in construction because they create stable, square structures.

This is a confusing distractor! The term "minor angle" usually refers to the smaller angle when two lines intersect, but $90^\circ$ is just $90^\circ$ - there's no "minor" about it.