Question

question 3
a closed polygon with three sides is called as a______.
○ triangle
○ quadrilateral
○ rectangle
○ transversal

Explanation:

A triangle is defined as a closed polygon with three sides. A quadrilateral has four sides, a rectangle is a type of quadrilateral (four - sided), and a transversal is a line that intersects two or more other lines, not a polygon with three sides.

Answer:

A. triangle