Area of a Trapezium and a Polygon
ICSE · Class 8 · Mathematics
All formulas from Area of a Trapezium and a Polygon in ICSE Class 8 Mathematics. Key equations, constants, and identities for board exam preparation.
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Formulas
2) Triangle: Area and Perimeter
Perimeter = a + b + c
s = (a + b + c)/2
Area = √(s(s-a)(s-b)(s-c))
Area = (1/2) × base × height
base = (2 × area)/height
3) Rectangle and Square
Perimeter of rectangle = 2(l+b)
Area of rectangle = l × b
Diagonal of rectangle = √(l² + b²)
Perimeter of square = 4 × side
Area of square = side²
4) Trapezium
Area of trapezium = (1/2) × (a+b) × h
h = (2 × area)/(a+b)
a+b = (2 × area)/h
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