A line is 180°, so the supplementary angel makes up the difference between. 180 - 60 = 120°
Answer:

Step-by-step explanation:
Required
The equation of the ellipse
This is calculated as:

Where:
---- height
--- width
So:



i think it would be +3 bc -3 is below 0.
16 rounded to the nearest number is 20 im not sure if i helped you though