Question

please solve step- by - step​

Answer 1

Answer:

$z + 40 + z + 20 + z + 30 \\ 3z + 90 \\ now \: 3z + 90 \: = > 180 \\ 3z = > 180 - 90 \\ 3z = > 90 \\ z = > 90 \div 3 \\ z = > 30 \\ hope \: this \: heps...$

now 1st angle = 30+40 = 70

2nd angle = 30+20 = 50

3rd angle = 30+30 = 60

Answer 2

Answer:

z+40+z+30+z+20=180(straight line)

3z+90=180

3z=90

z=30

ROW z+40=70

QOS z+20=50

SOPz+30=60