Question

are the figures similar? how do you know?

Answer 1

By the way you made them, I can say they are. However, since that may not be a given, I will say no due to there not being enough information.

Answer 2

that is all that i was given :?

Answer 3

if the shape inside is a circle, well all circles are similar by definition

now the triangles... they could vary
assuming all those scalene triangles are similar by SSS or so
then yes
but as larryboxaplenty said, that may not be a given