Building Blocks of Geometry Vocab

Front

What is a segment bisector?

Back

A line, ray, or segment that divides a segment into two equal parts.

Front

What are congruent segments?

Back

Segments that have the same length.

Front

What is a line segment?

Back

Consists of 2 endpoints and all the points in between.

Front

What are complementary angles?

Back

Two angles whose measures have a sum of 90°.

Front

What is a plane in geometry?

Back

A flat surface that extends infinitely in all directions.

Front

How is a plane named?

Back

By any 3 non-collinear points on the plane or an uppercase script letter.

Front

What is a ray?

Back

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

Front

What is a line?

Back

A straight path that extends infinitely in both directions.

Front

What are supplementary angles?

Back

Two angles whose measures have a sum of 180°.

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect.