SOLUTION: Can you please help me solve this question determine in a hand calculation the parabola with focus (o,o) and directrix x+y+1=0. what is its vertex? plot the parabola indicating ver
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-> SOLUTION: Can you please help me solve this question determine in a hand calculation the parabola with focus (o,o) and directrix x+y+1=0. what is its vertex? plot the parabola indicating ver
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Question 810496: Can you please help me solve this question determine in a hand calculation the parabola with focus (o,o) and directrix x+y+1=0. what is its vertex? plot the parabola indicating vertex, focus and directrix. thank you Answer by Edwin McCravy(20056) (Show Source):
The green line is the directrix x+y+1 = 0
The vertex V is half-way between the focus and the directrix on
a perpendicular from the focus to the directrix, the blue line
below:
Draw perpendiculars from the end of that blue line and from
the vertex V to the x-axis:
Now with a little bit of geometry knowledge, it's easy to
see that the vertex is
Edwin
