Derive the equation of the parabola with a focus at (0,1) and a directrix of y = -1

Two parallel lines are crossed by a transversal.what is value of x

Which is a true statement about an exterior angle of a triangle a. it is formed by two segments that are not sides of the triangle, b. it forms a linear pair with one of the interior angles of the triangle, c. it is complementary to one of the interior angles of the triangle. d. it is formed by two segments that are sides of the triangle.

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.