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ICSE-VIII-Mathematics

20: Area of Trapezium and a Polygon Class 8 Maths

with Solutions - page 3
Qstn# B-3 Prvs-QstnNext-Qstn
  • #3
    The diagonal of a rectangle is 34 cm. If its breadth is 16 cm; find its : (i) length (ii) area
    Ans : AC2 = AB2 + BC2 (By Pythagoras theorem)
    ⇒ (34)2 = l2 + (16)2
    ⇒ 1156 = l2 + 256
    ⇒ l2 = 1156 - 256
    ⇒ l2 = 900
    ⇒ l = √900 = 30 cm
    area = l × b = 30× 16 = 480 cm2 (i) 30 cm(ii) 480 cm2
  • #3-i
    length (ii) area
    Ans : 30 cm(ii) 480 cm2