Classify 2-D Shapes by Angles and Lines

Front

What is a trapezoid?

Back

A trapezoid is a four-sided shape (quadrilateral) that has at least one pair of parallel sides.

Front

How many right angles does a rectangle have?

Back

A rectangle has four right angles.

Front

What defines a triangle as acute?

Back

A triangle is acute if all three of its angles are less than 90 degrees.

Front

What is a circle?

Back

A circle is a round shape with no corners or edges and has no parallel sides.

Front

What are parallel lines?

Back

Parallel lines are lines that run in the same direction and never meet, no matter how far they are extended.

Front

How many sets of parallel lines does a parallelogram have?

Back

A parallelogram has two sets of parallel lines.

Front

What is the sum of the angles in a triangle?

Back

The sum of the angles in a triangle is always 180 degrees.

Front

What is a right angle?

Back

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

Front

What is the difference between a square and a rectangle?

Back

A square has four equal sides and four right angles, while a rectangle has opposite sides that are equal and four right angles.

Front

What is an obtuse angle?

Back

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