Geometry Vocabulary Flashcard

Front

What are two angles that share a common vertex and a common ray?

Back

Adjacent angles

Front

What does congruent mean?

Back

Having the same measurement (equal)

Front

What are complementary angles?

Back

When two angles add up to be 90 degrees

Front

Does a ray have one endpoint?

Back

True

Front

What is an exact location in space?

Back

Point

Front

What do you call angles that add up to 180 degrees?

Back

Supplementary angles

Front

What is a straight line that extends infinitely in both directions?

Back

Line

Front

What is a flat surface that extends infinitely in all directions?

Back

Plane

Front

What is an angle measuring less than 90 degrees called?

Back

Acute angle

Front

What is an angle measuring exactly 90 degrees called?

Back

Right angle