Obwody prostokątów i kwadratów - Matematyka Szkoła Podstawowa i Gimnazjum

In this video, I demonstrate how to calculate the perimeter of a rectangle and the perimeter of a square. I teach how to use mathematical formulas based on side lengths. I demonstrate two methods for calculating perimeter: summing the lengths of all sides and multiplying the length of a side by the appropriate number. I also analyze text examples with practical situations involving units of length such as centimeters, decimeters, and meters. I discuss the importance of the notation "a × b" when determining the sides of a rectangle and demonstrate the application of perimeter calculations to everyday objects such as doors, windows, and tables. CONTENT: 1. Definition of the perimeter of a polygon 2. Calculating the perimeter of any quadrilateral 3. Calculating the perimeter of a triangle 4. Perimeter of a rectangle – sum of the side lengths 5. Perimeter of a rectangle – multiplication formula 6. Perimeter of a square – adding sides 7. Perimeter of a square – multiplication formula 8. Problem: perimeter of a rectangle with sides 7 cm and 3 cm 9. Problem: perimeter of a rectangle written as 4 × 8 10. Problem: perimeter of a rectangle with sides 6 cm and 10 cm 11. Problem: perimeter of a square with sides 6 cm 12. Problem: perimeter of a square with sides 5 m 13. Applying perimeter in practical problems (window, door, table) 14. Real-world measurement and using the perimeter formula for a rectangle THE COMPLETION OF THIS VIDEO is available here:    • Dokończenie filmu p.t. Obwody prostokątów ...   You can find more on the playlist:    • GEOMETRIA NA PŁASZCZYŹNIE   You can get EASY ACCESS to all my math lessons using my website: www.matmagwiazdy.pl On this channel, you will find full lectures – 100% lessons – on Mathematics for Primary School, High School, and Technical School. Good luck :) Tomasz D. Gwiazda 00:00 Defining the perimeter of a polygon 00:12 Calculating the perimeter of any quadrilateral 01:15 Calculating the perimeter of a triangle 02:06 Perimeter of a rectangle - sum of the side lengths 03:01 Perimeter of a rectangle - multiplication formula 04:28 Perimeter of a square - adding sides 05:12 Perimeter of a square - multiplication formula 06:04 Actual measurement and using the rectangle perimeter formula 06:48 Problem: perimeter of a rectangle with sides of 7 cm and 3 cm 08:13 Problem: perimeter of a rectangle written as 4 × 8 09:28 Problem: perimeter of a rectangle with sides of 6 dm and 10 dm 11:28 Problem: perimeter of a square with sides of 6 cm 12:15 Problem: perimeter of a square with sides of 5 m 12:47 Using perimeter in problems practical (window, door, table)