Area and perimeter of shapes
Rectangle
Area = length × breadth
Perimeter = 2 × (length + breadth)
2. Square
Area = side × side = side²
Perimeter = 4 × side
3. Triangle
Area = ½ × base × height
Perimeter = sum of all 3 sides
4. Circle
Area = π × radius² (π ≈ 3.14)
Perimeter (circumference) = 2 × π × radius
5. Parallelogram
Area = base × height
Perimeter = 2 × (base + side)
6. Trapezium (Trapezoid)
Area = ½ × (sum of parallel sides) × height
Perimeter = sum of all 4 sides
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