Front

What are perpendicular lines?

Back

Lines that meet at a 90 degree angle.

Front

What is the measure of a straight angle?

Back

180 degrees.

Front

Which quadrilaterals have all sides of equal length?

Back

Rhombus and square.

Front

What is a rectangle?

Back

A quadrilateral with 4 right angles, 2 sets of parallel lines, and opposite sides equal.

Front

How many acute angles does an acute triangle have?

Back

3 acute angles.

Front

What is a right angle?

Back

An angle that measures exactly 90 degrees.

Front

What is a triangle?

Back

A polygon with three sides and three angles.

Front

What is a quadrilateral?

Back

A polygon with four sides.

Front

What is the sum of the interior angles of a triangle?

Back

180 degrees.

Front

What is a square?

Back

A quadrilateral with all sides equal and all angles equal to 90 degrees.