Question

The three angles of a quadrilateral are 60 degrees, 90 degrees and 110 degrees. Determine the fourth angle

Answer 1

sin75^°-sin15^°=1/√2

Answer 2

100°

Explanation:

The sum of any polygon angles add to ( n-2)(180) where n is the number of sides ......for a quadrlateral ( 4-2)(180 ) = 360

60 + 90 + 110 + x = 360 shows x = 100 °