Semi-regular Tilings | Class 7 Maths Ch 14 | NCERT Ganita Prakash

In this lesson: • An old floor of regular octagon tiles: how does it work? • 135° + 135° + 90°: a square fills each gap • Semi-regular tiling: mixed regular tiles, every point the same • Three triangles and two squares; two hexagons and two triangles • Any triangle tiles: two copies make a parallelogram • Any quadrilateral without a dent tiles: corners add to 360° • Octagon, octagon, triangle leaves a 30° gap • Memory line: mix the shapes, check the corners NCERT Ganita Prakash, Class 7 — Chapter 14: Constructions and Tilings