Objects like clocks (circle), books (rectangle), or tiles (square) have regular shapes. Perimeters are calculated based on specific formulas, such as 4 x side for squares or 2 x (length + breadth) for rectangles.
Class 6 NCERT Ganita Prakash Chapter 6 Perimeter and Area
class 6 Mathematics Textbook Chapter 6 question answer
Examples of regular shapes in surroundings include square tiles, rectangular books, and circular clocks. The perimeters can be calculated using their respective formulas. For instance, a square tile with a side of 10 cm has a perimeter of 4 x 10 = 40 cm. For rectangles, use 2 x (length + breadth), and for circles, use 2 x π x radius. Understanding these calculations helps generalize perimeter formulas for all regular polygons like pentagons and hexagons.
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