Question

three angles of a quadrilateral are 45 degree, 67 degree, 105 degree, find the fourth angle

Answer 1

$360 - (45 + 67 + 105) \\ 360 - 217 \\ = 143$

Answer 2

sum of the angles of quadrilateral =360
therefore,,45+67+105+unknown angle =360
217+unknown angle =360
therefore unknown angle =360-217=143
hope it will help uu