The size of the 4th angle is 72.
Given:
1st angle = 148
2nd angle = 104
3rd angle = 36
shape = quadrilateral.
A quadrilateral is a shape that has 4 sides or edges, 4 corners or vertices.
It goes to show that it must also have 4 angles. These four angles must give the sum of 360°.
Since the first three angles are given, we can get the fourth angle by deducting the sum of the three angles from 360°
4th angle = 360° - 148° - 104° - 36°
= 360° - 288°
4th angle = 72°
