Answer:

Question No.1

Both have at least one slanted side.To move an object using an inclined plane, you apply the force directly to the object. However, to move (split or separate) something using a wedge, you apply the force to the wedge and it translates the force to the object.

Question No.2

It have a slant sharp thing so that you can split an object into two.

Question No.3 is not complete sentence so I can't answer Hope it helps!