We are given with the data of a parabola with vertex at (2, 2) and directrix at <span>y = 2.5. the formua should be ax^2 + b x + c = y because of the directrix.
(x-h)^2 = 4a (y-k) (x-2)^2 =4a (y-2) a is the equidistant distance from focus to vertex and from vertex to directrix that is equal to -0.5 then the answer is </span>(x-2)^2 =-0.5*4 (y-2) <span>x2 - 4x + 4 = -2y +4 x2-4x+2y = 0
The student is wrong because the sum of any two sides of a triangle should be greter than the third side. The length of a single side of a triangle can not be half or more than half of the perimeter of that triangle. And since the given length is more than half of the perimeter , the student is incorrect .
