Answer:
155°
Step-by-step explanation:
The sum of the 4 interior angles of a quadrilateral = 360°
Subtract the sum of the 3 given angles from 360 for fourth angle
fourth angle = 360° - (60 + 45 + 100)° = 360° - 205° = 155°
2
there is 2: 3<u> 1 </u>
4
The supplement of 89° is the angle that when added to 89° forms a straight angle (180° ).
12 left over 100-88=12
