Angles in triangle add to 180 degrees
20x=180
x=9
Angle ABC is the top one
8x9=72
There are 160 small cars that were washed because u divide
800/ 5= 160. :P
Hope this helps you!!
1+4 = 5
2+5 and add 5 = 12
3+6 and add 12 = 21
4+7+21=32
5+8+32=45
6+9+45=60
7+10+60=77
8+11+77=96
Co-terminal angle = 456 - 360 = 96 degrees