Geometry

Front

What is a line in geometry?

Back

A straight path that extends infinitely in both directions with no endpoints.

Front

What do we call two lines that meet at a right angle?

Back

Perpendicular lines.

Front

What is a right triangle?

Back

A triangle that has one angle measuring 90 degrees.

Front

What is the measure of a straight angle?

Back

180 degrees.

Front

What is a line of symmetry?

Back

A line that divides a shape into two identical parts.

Front

How many lines of symmetry does a square have?

Back

Four lines of symmetry.

Front

What is an acute angle?

Back

An angle that measures less than 90 degrees.

Front

What is an obtuse angle?

Back

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

Front

What is a polygon?

Back

A closed figure with three or more straight sides.

Front

What is the sum of the angles in a triangle?

Back

180 degrees.