Question

Найди периметр многоугольников. Сколько среди них прямоугольников, квадратов?

Answer 1

6 см + 6 см + 3 см = 15 см ( это вторая фигура )

3 см + 3 см + 3 см + 3 см = 12 см ( это третья фигура )

Answer 2

Perimeter of Polygons

The perimeter of a polygon is the total distance around its exterior. It is calculated by adding together the lengths of all the sides of the polygon.

Number of Rectangles and Squares

The number of rectangles and squares among the polygons is not explicitly mentioned in the search results provided.

Given the search results, I'm unable to provide specific information about the number of rectangles and squares among the polygons. If you have specific polygons in mind or additional details, I'd be happy to help further.