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ICSE-VIII-Mathematics

20: Area of Trapezium and a Polygon Class 8 Maths

with Solutions - page 3
Qstn# B-8 Prvs-QstnNext-Qstn
  • #8
    The diagonal of a square is 15 m; find the length of its one side and perimeter.
    Ans : Diagonal of square = 15 m
    Let side of square = a
    a2 + a2 = (15)2 = 225
    ⇒ a2 = 225/2 = 112.50
    ⇒ a = √112.50 = 10.6 m
    Perimeter = 4 × a = 10.6×4 = 42.4 m