Wielokąty (Część 2) - przekątne i obwody -Matematyka Szkoła Podstawowa i Gimnazjum

In this video, I explain diagonals and perimeters in polygons, teach how to identify diagonals in various types of polygons, including convex and concave ones, and demonstrate how to systematically draw all the diagonals of a given polygon. I discuss the definition of a diagonal as a segment connecting two non-vertex sides that are not a side of a figure, show special cases for triangles and concave polygons, and then move on to the topic of a polygon's perimeter, which is the sum of its side lengths. I show how to calculate the perimeter of a triangle, rectangle, and square, review formulas, and for polygons with different side lengths, I demonstrate how to add their values, emphasizing the need to standardize the units of length in case of confusion. TABLE OF CONTENTS: 1. Definition of a Polygon and Introduction to Diagonals 2. Diagonals in Convex and Concave Polygons 3. Systematic Drawing of Diagonals in a Polygon 4. Special Cases of Diagonals – Triangle, Quadrilateral, Hexagon 5. Perimeter of a Polygon – Definition and Calculation 6. Calculating the Perimeter of a Triangle 7. Calculating the Perimeter of a Rectangle and Square 8. Calculating the Perimeter of a Polygon with Different Sides 9. Converting Units of Length When Calculating Perimeter The END of this video is available here:    • Dokończenie filmu p.t. Wielokąty (Część 2)...   You can find more in the Playlist:    • GEOMETRIA NA PŁASZCZYŹNIE   Get EASY ACCESS to all my math lessons by visiting my website: www.matmagwiazdy.pl On this channel, you'll find a full lecture - 100% of the lesson - on Mathematics for Elementary School, High School, and Technical School. Good luck :) Tomasz D. Gwiazda 00:00 Definition of a Polygon and Introduction to Diagonals 01:44 Diagonals in Convex and Concave Polygons 02:38 Special Cases of Diagonals - Triangle, Quadrilateral, Hexagon 04:13 Systematic Drawing of Diagonals in a Polygon 08:37 Perimeter of a Polygon - Definition and Calculation Method 09:05 Calculating the Perimeter of a Triangle 09:36 Calculating the Perimeter of a Rectangle and Square 11:28 Calculating the Perimeter of a Polygon with Different Sides 12:28 Converting Units of Length When Calculating Perimeter