PLANE GEOMETRY - POLYGONS In this video, I work with polygons. I address topics such as convexity and non-convexity, calculating the number of diagonals, the sum of internal and external angles, and I give some examples. 1. Given that AP and CP are bisectors of â and ^ce, and AB//PC and AP//BC, calculate the value of x. 2. A regular polygon has as many diagonals from one of its vertices as there are diagonals of a hexagon. Find the polygon. Also watch Primitive Concepts and Initial Definitions - PLANE GEOMETRY (lesson 01) • ⭕ Primitive Concepts and Initial Definitions... Angles - PLANE GEOMETRY (lesson 02) • ⭕ Angles - PLANE GEOMETRY (lesson 02) Exercises on angles - PLANE GEOMETRY (lesson 03) • ⭕ Exercises on angles - PLANE GEOMETRY... Parallels Intercepted by a Transversal - PLANE GEOMETRY (lesson 04) • ⭕ Parallels Intercepted by a Transversal... Triangles - PLANE GEOMETRY (lesson 05) • ⭕ Triangles - PLANE GEOMETRY (lesson 05) Notable Points of the Triangle - PLANE GEOMETRY (lesson 06) • ⭕ Notable Points of the Triangle - GEOMETRY... Quadrilaterals - Trapezoid - PLANE GEOMETRY (Lesson 07) • ⭕ Quadrilaterals - Trapezoid - PLANE GEOMETRY... Parallelograms - PLANE GEOMETRY (Lesson 08) • ⭕ Parallelograms - PLANE GEOMETRY (Lesson 09) • ⭕ Rectangle, Rhombus and Square - PLANE GEOMETRY (Lesson 09) • ⭕ Rectangle, Rhombus and Square - GEOMETRY... Polygons - PLANE GEOMETRY (Lesson 10) • ⭕ Polygons - PLANE GEOMETRY (Lesson 10) Thales' Theorem - PLANE GEOMETRY (Lesson 11) • ⭕ Thales' Theorem - PLANE GEOMETRY ... Similarity of Triangles - PLANE GEOMETRY (Lesson 12) • ⭕ Similarity of Triangles - PLANE GEOMETRY... Metric Relations in Right Triangle (Demonstration and Exercises) - PLANE GEOMETRY (Lesson 13) • ⭕ Metric Relations in the Right Triangle... Law of Sines - PLANE GEOMETRY (Lesson 14) • ⭕ Law of Sines - PLANE GEOMETRY (Lesson 15) • ⭕ Law of Cosines - PLANE GEOMETRY (Lesson 16) • ⭕ Stewart's Relation - PLANE GEOMETRY (Lesson 17) • ⭕ Circle and Circumference (Part 1) ... Circle and Circumference (Part 2) - PITOT'S THEOREM - PLANE GEOMETRY (Lesson 18) • ⭕ Circle and Circumference (Part 2) ... Circle and Circumference (Part 3) - EXERCISES - PLANE GEOMETRY (Lesson 19) • ⭕ Circle and Circumference (Part 3) ... Angles in the Circumference - PLANE GEOMETRY (Lesson 20) • ⭕ Angles in the Circumference - GEOMETR... Regular Polygons (Part 1) - PLANE GEOMETRY (Lesson 21) • ⭕ Regular Polygons (Part 1) - GEO... Regular Polygons (Part 2) Inscribed (apothem and side) - PLANE GEOMETRY (Lesson 22) • ⭕ Regular Polygons (Part 2) Inscribed... Regular Polygons (Part 3) Circumscribed (apothem and side) - PLANE GEOMETRY (Lesson 23) • ⭕ Regular Polygons (Part 3) Circu... Power of a Point - PLANE GEOMETRY (Lesson 24) • ⭕ Power of a Point - PLANE GEOMETRY... Length of the Circumference (with exercises) - PLANE GEOMETRY (Lesson 25) • ⭕ Length of the Circumference (with ... Area of ​​Polygons - PLANE GEOMETRY (Lesson 26) • ⭕ Area of ​​Polygons - PLANE GEOMETRY... Area of ​​Triangles - PLANE GEOMETRY (Lesson 27) • ⭕ Area of ​​Triangles - PLANE GEOMETRY... Area of ​​the Circle and its Parts - PLANE GEOMETRY (Lesson 28) • ⭕ Area of ​​the Circle and its Parts - ...