Yes the ratio of a right angle is 1:4
Answer:
option a is correct.
Step-by-step explanation:
We have given the equation:

Squaring both sides of the above equation we get:

After simplifying the first step



After final simplification we get:

We are getting quadratic equation since, the degree in resultant is 2.
Therefore, option a is correct.
To find out the area of the field, you just need to multiply 80 meters by 120 meters.
80 meters * 120 meters = 9600 meters²
Therefore, the unit of measurement to figure out how much fertilizer is needed to cover the field is meters².