Classify 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

1. Equilateral: All sides are equal. 2. Isosceles: Two sides are equal. 3. Scalene: All sides are different.

Front

What is a quadrilateral?

Back

A quadrilateral is a four-sided polygon.

Front

What are the types of quadrilaterals?

Back

1. Square: All sides equal, all angles right. 2. Rectangle: Opposite sides equal, all angles right. 3. Parallelogram: Opposite sides equal, opposite angles equal. 4. Trapezoid: At least one pair of parallel sides.

Front

What is a right triangle?

Back

A right triangle has one angle that measures 90 degrees.

Front

What is an acute triangle?

Back

An acute triangle has all angles measuring less than 90 degrees.

Front

What is an obtuse triangle?

Back

An obtuse triangle has one angle that measures more than 90 degrees.

Front

What is a square?

Back

A square is a quadrilateral with all sides equal and all angles right.

Front

What is a rectangle?

Back

A rectangle is a quadrilateral with opposite sides equal and all angles right.

Front

What is a parallelogram?

Back

A parallelogram is a quadrilateral with opposite sides equal and parallel.