Geometry Vocabulary Review 1.3-1.6

Front

What is a ray?

Back

A ray is a part of a line that starts at a point and extends infinitely in one direction.

Front

What does the symbol '≅' mean?

Back

The symbol '≅' means 'is congruent to', indicating that two figures have the same shape and size.

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always equal.

Front

What are supplementary angles?

Back

Supplementary angles are two angles whose sum is 180 degrees.

Front

What are adjacent angles?

Back

Adjacent angles are two angles that share a common side and a common vertex but do not overlap.

Front

What is a linear pair?

Back

A linear pair consists of two adjacent angles that form a straight line, summing to 180 degrees.

Front

What is an obtuse angle?

Back

An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees.

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 90 degrees.

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Front

What does it mean for angles to be complementary?

Back

Complementary angles are two angles whose sum is 90 degrees.