<span>
When the focus and directrix are used to derive the equation of a parabola, two distances were set equal to each other.
The distance between the directrix and<span>
a point on the parabola </span>is set equal to the distance between the
focus and the same point on the parabola.
</span>
The three answers you have are correct. The last fourth answer is coincidentally "angle 4". If another number other than '4' was in the diagram, then you would label it as angle X (replace X with that number in question).
note: you can say "angle 4" or you can use the angle markers as you have been doing. It's probably best to stay consistent.
Answer:
x = 4
Step-by-step explanation:
Note the x- coordinate of the 2 points are equal.
This indicates the line is vertical with equation
x = c
where c is the value of the x- coordinates the line passes through, that is 4
Thus the equation of the line is x = 4
Answer:
892 ft (3 sf)
Step-by-step explanation:
Sin(48) = x/1200
x = 891.7737906 ft
