Label the points and the plane to show AB←→ ⊥ plane S, EC¯¯¯¯¯¯¯¯≅ED¯¯¯¯¯¯¯¯, and DB←→ intersecting plane S at point D.

Determine whether the quadrilateral below is a parallelogram. justify/explain your answer (this means back it up! give specific information that supports your decision. writing just "yes" or "no" will result in no credit.)

Through non-collinear points there is exactly one plane.

Select the correct answer and solve for y