Which pairs of polygons are similar?
select each correct answer.

The first and fourth pair of polygons are similar.

Step-by-step explanation:

If two polygons are similar then their corresponding sides are proportional.

Let's check

In the first pair there are two rectangles and their dimensions are proportional as

In the second pair there are right triangles but their dimensions are not proportional as

and

In the third pair there is one isosceles triangle and other is equilateral triangle, which can not be similar as they have different type of triangles.In the fourth pair there are two right trapezoid and their dimensions are proportional as