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ICSE-VIII-Mathematics

16: Understanding Shapes (Including Polygons) Class 8 Maths

with Solutions - page 7
Qstn# C-13 Prvs-QstnNext-Qstn
  • #13
    Use the following figure to find the value of x
    Ans : The sum of exterior angles of a quadrilateral

    y + 80° + 60° + 90° = 360°
    ⇒ y + 230° = 360°
    ⇒ y = 360° - 230° = 130°
    At vertex A,
    ∠y + ∠x = 180° (Linear pair)
    x = 180° - 130°
    ⇒ x = 50°