Classify Triangles and Quadrilaterals

Front

What is an isosceles triangle?

Back

A triangle with at least two sides of equal length.

Front

What is a scalene triangle?

Back

A triangle with all sides of different lengths.

Front

What is an equilateral triangle?

Back

A triangle with all three sides of equal length.

Front

What is an acute triangle?

Back

A triangle where all angles are less than 90 degrees.

Front

What is an obtuse triangle?

Back

A triangle with one angle greater than 90 degrees.

Front

What is a quadrilateral?

Back

A polygon with four sides and four angles.

Front

What are the properties of a rectangle?

Back

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

Front

What is a square?

Back

A rectangle with all four sides of equal length.

Front

What is a parallelogram?

Back

A quadrilateral with opposite sides that are parallel and equal in length.

Front

What is a trapezoid?

Back

A quadrilateral with at least one pair of parallel sides.