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ICSE-VIII-Mathematics

20: Area of Trapezium and a Polygon Class 8 Maths

with Solutions -
Qstn# A-2 Prvs-QstnNext-Qstn
  • #2
    Two sides of a triangle are 6 cm and 8 cm. If height of the triangle corresponding to 6 cm side is 4 cm; find : (i) area of the triangle (ii) height of the triangle corresponding to 8 cm side.
    Ans :
    BC = 6 cm
    Height AD = 4 cm
    Area of ∆ = ½ × base × height
    = 1//2 × BC × AD
    = ½ × 6 × 4
    = 12 cm2
    Again area of ∆ = ½ × AC × BE
    12 = ½ × 8 × BE
    ∴ BE = (12 × 2)/8
    BE = 3 cm
    ∴ (i) 12 cm2
    (ii) 3 cm