Measuring Angles and Reflection Flashcard #1

Front

What is the measure of a right angle?

Back

90 degrees.

Front

What is the measure of a straight angle?

Back

180 degrees.

Front

What is the measure of an acute angle?

Back

Less than 90 degrees.

Front

What is the measure of an obtuse angle?

Back

Greater than 90 degrees but less than 180 degrees.

Front

What is the term for the ray of light that strikes a reflecting surface?

Back

Incident ray.

Front

What is the term for the ray of light that bounces off a reflecting surface?

Back

Reflected ray.

Front

What is the normal line in the context of reflection?

Back

A line perpendicular to the surface at the point of incidence.

Front

What is diffuse reflection?

Back

Reflection that occurs on rough surfaces, scattering light in many directions.

Front

What is the law of reflection?

Back

The angle of incidence is equal to the angle of reflection.

Front

What is the measure of the angle formed by two intersecting lines?

Back

The sum of the angles is 180 degrees.