Answer:
The first one. Top left.
Step-by-step explanation:
The top right one makes a triangular prism.
I don't even know if the bottom right is even a thing.
The bottom left is a cube.
Answer:
what equation I don't see one
Can you make the a bit more clear
Answer:
It would be 7cm
Step-by-step explanation:
please find step by step explanation on the picture