Lines, angles, triangles, quadrilaterals, protractors

Front

What is an obtuse triangle?

Back

A triangle with one angle greater than 90 degrees.

Front

What is an acute angle?

Back

An angle that measures less than 90 degrees.

Front

What is a right angle?

Back

An angle that measures exactly 90 degrees.

Front

What are perpendicular lines?

Back

Lines that intersect to form right angles.

Front

What is the measure of an obtuse angle?

Back

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

Front

What is a quadrilateral?

Back

A polygon with four sides.

Front

What is a triangle?

Back

A polygon with three sides.

Front

What is a protractor used for?

Back

A tool used to measure angles in degrees.

Front

What is the sum of the angles in a triangle?

Back

180 degrees.

Front

What is the measure of a straight angle?

Back

An angle that measures exactly 180 degrees.