Classifying Triangles and Quadrilaterals

Front

What is a triangle?

Back

A triangle is a three-sided polygon.

Front

What are the types of triangles based on side lengths?

Back

The types of triangles based on side lengths are equilateral, isosceles, and scalene.

Front

What is an equilateral triangle?

Back

An equilateral triangle has all three sides of equal length and all angles measuring 60 degrees.

Front

What is an isosceles triangle?

Back

An isosceles triangle has at least two sides of equal length and the angles opposite those sides are equal.

Front

What is a scalene triangle?

Back

A scalene triangle has all sides of different lengths and all angles of different measures.

Front

What is a right triangle?

Back

A right triangle has one angle that measures exactly 90 degrees.

Front

What is a quadrilateral?

Back

A quadrilateral is a four-sided polygon.

Front

What are the types of quadrilaterals?

Back

The types of quadrilaterals include rectangles, squares, parallelograms, trapezoids, and rhombuses.

Front

What is a rectangle?

Back

A rectangle is a quadrilateral with opposite sides equal and all angles measuring 90 degrees.

Front

What is a square?

Back

A square is a rectangle with all four sides of equal length.