Answer:
20%
Step-by-step explanation:
cross multiply then divide!
Answer:

Step-by-step explanation:
I guess you are asking the value of the Angle x, if so
it's equal to 180°-31° ==> mes angle x =149°
Answer:
20
Step-by-step explanation:
If the two triangles are similar, then corresponding sides must share a constant ratio. This means that:

Let's use the second ratio:

Multiply both sides by 12:

Hope this helps!
Answer:
Base at the top should be the same length, thus 20ft.
right triangle thus 90 degrees angle.
180 - 90 - 40 = 50
20ft/sin50 = Height/sin40
Height of the traffic light = 16.78
16.78 + the height of Andrew eyes ( 5ft) = 21.78