What do the angles in a quadrilateral add up to?
Answer: The interior angles of a quadrilateral add up to 360°
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°