What do the angles in a quadrilateral add up to?

A quadrilateral can be defined as a closed, two-dimensional shape that has four straight sides, four vertices or corners, and four angles. In any quadrilateral, the sum of the four angles is 360°.

Answer: The interior angles of a quadrilateral add up to 360°

Explanation: 

The formula for calculating the sum of interior angles of a polygon is ( n − 2 ) × 180°, n is the number of sides of a polygon.

Sum of angles in a quadrilateral = (4 - 2) × 180° = 2 × 180° = 360°

⇒ The sum of all interior angles is 360°.

Thus, the interior angles of a quadrilateral add up to 360°