Geometry: Lines, Angles & Polygons

Front

What is an obtuse angle?

Back

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

Front

What is an acute angle?

Back

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

Front

What is a right angle?

Back

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

Front

What is a straight angle?

Back

A straight angle is an angle that is exactly 180 degrees.

Front

What is a line?

Back

A line is a straight path that extends infinitely in both directions.

Front

What is a ray?

Back

A ray is a part of a line that has one endpoint and extends infinitely in one direction.

Front

What is a line segment?

Back

A line segment is a part of a line that has two endpoints.

Front

What is a polygon?

Back

A polygon is a closed figure made of three or more line segments.

Front

What is a trapezoid?

Back

A trapezoid is a polygon with at least one pair of parallel sides.

Front

What is a quadrilateral?

Back

A quadrilateral is a polygon with four sides.