Answer:
51
Step-by-step explanation:
357 ÷ 7 = 51 just divide
if we divide 357 by 7, we should have 51. meaning 357 chair divided in 7 rows, is 51 chairs per row.
1. equal
2. add to 180
3. equal
4. add to 180
as 1 and 3 are linear pairs
2 and 4 are vertically opposite angles
y-coordinate is 5 or -1.
have a nice day
