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Asked by Praveen Last Modified
Answer 
Tasneem
For each triangular piece,
Semi-perimeter, 
By Heron’s formula,
Area of triangle
Since there are 5 triangular pieces made of two different coloured cloths,
Area of each cloth required
Area of each triangular cloth
= √60 ( 60 - 50 ) ( 60 - 50 ) ( 60 - 20 )
= √60 × 10 × 10 × 40 = √ 2 × 2 × 3 × 5 × 10 × 10 × 2 × 2 × 2 × 5 = 2 × 2 × 10 × 5 √3 × 2
= 200√6cm².
Cloth required for each colour = 200√6 × 5 = 1000√6cm².
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A park, in the shape of a quadrilateral ABCD, has ∠ C = AB = 9 m, BC = 12 m, CD = 5 m and AD = 8 m. How much area does it occupy?
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