Sorry if this is not correct.

Answer:

1. Cube - A 3D Object that is made of 2d squares

2. Cone - A 3D object that when u spin a 2d right triangle it makes a cone

3. Square Pyramid - Same as cone but its bottom is a square. But you can't make it with a Right Triangle

4. Cylinder - A 3D object that is made of circles when u extend it downwards or made of rectangles if u spin it.

5. Sphere - A 3D object made of Semi-Circles

6. Triangular Prism - You can make it by extending a triangle downwards

7. Rectangular Prism - Same as Triangular Prism but you use a Rectangle instead