A parabola can be drawn given a focus of (-5, 6)(−5,6) and a directrix of y=-6y=−6. Write the equation of the parabola in any form.

The perimeter of △cde is 55 cm. a rhombus dmfn is inscribed in this triangle so that vertices m, f, and n lie on the sides cd , ce , and de respectively. find cd and de if cf=8 cm and ef=12 cm. the answer is not cd=20 and de=15. i have tried that one, it does not work.