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 angles?

Back

1. Right Triangle: One angle is 90 degrees. 2. Obtuse Triangle: One angle is greater than 90 degrees. 3. Acute Triangle: All angles are less than 90 degrees.

Front

What are the types of triangles based on sides?

Back

1. Scalene: All sides are of different lengths. 2. Isosceles: Two sides are of equal length. 3. Equilateral: All three sides are of equal length.

Front

What is a quadrilateral?

Back

A quadrilateral is a four-sided polygon.

Front

What are the types of quadrilaterals?

Back

1. Square 2. Rectangle 3. Rhombus 4. Parallelogram 5. Trapezoid

Front

What defines a square?

Back

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

Front

What defines a rectangle?

Back

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

Front

What defines a rhombus?

Back

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

Front

What defines a parallelogram?

Back

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

Front

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

Back

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