Suppose we have to cover the $xy$ -plane with identical tiles such that no two tiles overlap and no gap is left between the tiles. Suppose that we can choose tiles of the following shapes; equilateral triangle, square, regular pentagon, regular hexagon. Then the tiling can be done with tiles of

All squares are similar

All squares are 

$3$ squares are represented in the following three figures. For this figure, _____statement is true.

Fill in the blank using the correct word given in the bracket.

All circles are _____ (Congruent, similar)

What are congruent circles?

Squares of all sizes are similar.

Consider the following figure shown below and choose which of the following equation is CORRECT about the similarity of both triangles?