Class 7- MATHEMATICS
    About Lesson

    Perimeter & area

    • Perimeter is the total boundary length of a closed figure

      • Perimeter of a square –

    4x length of a side

      • Perimeter of a rectangle –

     2x(length + breadth)

    • Perimeter of triangle

    Sum of the three sides

    • Area is the amount of a surface covered by any shape. 

      • Area of a rectangle 

    Length x breadth (lb)

    • Length  = area ÷ breadth

    • Breadth = area ÷ length 

    • Area of square = side x side

    • Side of area =√its area

    • 1 hectare = 10,000m2