Question

The three angles of a quadrilateral are 89°, 76° and 118° respectively. Find the fourth angle.

Answer 1

Answer:

77°

Step-by-step explanation:

Let the fourth angle be x.

Sum of internal angles of a 4 sided quadrilateral is 360°,

89° + 76° + 118° + x = 360°

283° + x = 360°

x = ( 360 - 283 )°

x = 77°

Therefore, the forth angle is 77°.