Asolid has faces that consist of 2 triangles and 3 rectangles. the solid has 9 edges. how many vertices does the solid have?
a. 6 vertices
b. 8 vertices
c. 10 vertices
d. 12 vertices

The question is asking to choose among the following choices is the answer that states on the count of the vertices does the solid have if a solid has a face that consist of 2 triangles and 3 rectangles and with that, I would say that the answer would be D. 12 vertices. I hope you are satisfied with my answer 

Cd is the perpendicular bisector of both xy and st, and cy=20.find xy

The answer should be 3%