Three angles of a quadrilateral are 60°, 120°, and 90°. What is the fourth angle?
Note
A quadrilateral has a total angle sum of 360°. Add the given angles to get 270°, then subtract from 360°: the fourth angle is 90°.
Three angles of a quadrilateral are 60°, 120°, and 90°. What is the fourth angle?
A quadrilateral has a total angle sum of 360°. Add the given angles to get 270°, then subtract from 360°: the fourth angle is 90°.