Which of the following is NOT a type of triangle based on side lengths?

Which of the following is NOT a type of triangle based on side lengths?

Step 1: Understand what a triangle is. A triangle is a shape with three sides.
Step 2: Learn about the types of triangles based on side lengths. They are: equilateral (all sides equal), isosceles (two sides equal), and scalene (all sides different).
Step 3: Identify the options given in the question. Look for the one that does not fit the definition of a triangle.
Step 4: Recognize that a quadrilateral is a shape with four sides, which means it cannot be a triangle.
Step 5: Conclude that the answer to the question is the quadrilateral, as it is not a type of triangle.

No concepts available.