shapes have the same shapes but different sizes.

All squares are 

Squares of all sizes are similar.

All squares are similar

Let $ABC$ be a triangle and $M$ be a point on side $AC$ closer to vertex $C$ than $A$. Let $N$ be a point on side $AB$ such that $MN$ is parallel to $BC$ and let $P$ be a point  on side $BC$ such that $MP$ is parallel to $AB$. If the area of the quadrilateral $BNMP$ is equal to $\frac{5}{18}$ of the area of $\mathrm{\Delta }ABC$, then the ratio $AM/MC$ equals

$3$ 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?