16:1
5:11
The corresponding sides of similar solids have a constant ratio.
yes
If the length ratio is 2:7 then the area ratio would be 4:49, squaring the 2 and the 7.
I think you probably mean platonic. The cube is one of only five platonic solids. These are the only shapes that can be made with outward-pointing corners and sides all of the same lengths.
7:10
16:1
18:32
7:10
16:25
9 36
4:1
4:25
5:11
The statement is true.
4:12 (Apex)
false - APEX