Geometry Vocab Flashcard_Unit 1 #1

Front

What is a location with no size or shape?

Back

Point

Front

What are two angles across from each other on intersecting lines that are always congruent?

Back

Vertical angles

Front

What are two angles whose sum is 180 degrees?

Back

Supplementary angles

Front

What is a measurable part of a line consisting of two endpoints?

Back

Line segment

Front

What is a flat surface made up of points and extends indefinitely in all directions?

Back

Plane

Front

What is the term for angles that add up to 90 degrees?

Back

Complementary angles

Front

What do you call two lines that never intersect?

Back

Parallel lines

Front

What is the term for a straight line that touches a curve at a single point?

Back

Tangent

Front

What is the distance around a circle called?

Back

Circumference

Front

What is the term for a polygon with four sides?

Back

Quadrilateral