Question

three angles of a quadrilateral are 100°,90°and110° what is the four angle
(a) 30°(b) 120°(c)160°(d) 60°​

Answer 1

Answer:

sum of all angles of a quadrilateral is 180°

let the fourth angle be y

therefore,

100+90+110+y = 360

300+y = 360

y = 360-300

y = 60

Answer 2

Answer:

D 60° is sum of the quadrilateral