Answer:
angle 1= 70 degrees
angle 2= 65 degrees
angle 3= 65 degrees
angle 4 = 115 degrees
angle 5= 45 degrees
angle 6= 45 degrees
angle 7= 45 degrees
Step-by-step explanation:
Area=width*height
area=(11.7)*(15.4)
area=180.18cm^2
1) in one minute for first wiil be 1/20
the other 1/30, it means that A paint in one minute 1/20 and B 1/30 then A+B in one minute 1/20 + 1/30 = 3+2/60 = 5 / 60, 5/60 = 1/12
if in one min they make 1/12 then in 12 min they paint all the wall
Area of trapezium= 1/2 × (a+b) × h
= 1/2 × (12 + 8) × 8
= 1/2 × 20 × 8
= 10 × 8
= 80 cm^3
Hope it helps you