Answer: 
Step-by-step explanation:
The area of a parallelogram can be calculated with the following formula:

Where "b" is the length of any base of the parallelogram and "h" is the height.
In this case you can identify in the figure provided in the exercise, that:

Then, knowing those values, you can substitute them into the formula shown above, as below:

Finally, you must evaluate in order to find the area of the given parallelogram.
You get the following result:

2 1/8=2.125
2.125?34=1/16
Remark
This really belongs in physics. However, it can be done here. The angular velocity does not have anything to do with the length of the blade,
ω = 2π radians / time which will give you radians
ω = 2π * 45 rpm
ω = 90 π radians / minute.
This usually is expressed as radians per second
ω = 90 π / 60 radians / second
ω = 1.5 π radians / second.
Answer: y = 144
because l//m
=> y + x = 180°
but y = 4x (2 vertical angles) => x = y/4
with x = y/4
=> y + y/4 = 180°
⇔ 5y/4 = 180°
⇔ 5y = 180.4 = 720
⇔ y = 720/5 = 144
Step-by-step explanation: