F,e and h,i are vertical angles i think.
In most approximate way it can never be the area of the circle (Accurate area)
This is why because after creating base lines of each triangle it forms an inscribed polygon .
- Some little spaces left over each side or b_n
So
h is already approaching to r
- and b_1+b_2..b_n is approaching to the perimeter i.e 2πr
Option B
A quadratic equation is written in the form
Looking at the second, third, and fourth options, we see that the highest powers are greater than two, which automatically disqualifies them from being quadratics (since the highest power in a quadratic is 2).
This makes the first option the correct choice since the expansion of the equation gives 
Answer:
Step-by-step explanation:
d because r down the point is. The Y Coordinate is always written second in an ordered pair of coordinates