Answer:
1. a. 3
b. 1
c. 2
2. (2+4+5=11) 495/11=45
a. 45x2=90
b. 45x4=180
c. 45x5=225
3. angle of triangle=180°
(2+3+4=9) 180°/9=20
2x20°=40°
3x20°=60°
4x20°=80°
the biggest is of course 80°
