Every perimeter, area and volume formula you need for Classes 8–10 on one page, with units reminders.
2D shapes — perimeter & area
- Square: Perimeter = 4a, Area = a²
- Rectangle: Perimeter = 2(l + b), Area = l × b
- Triangle: Area = ½ × base × height
- Circle: Circumference = 2πr, Area = πr²
- Parallelogram: Area = base × height
- Trapezium: Area = ½ × (sum of parallel sides) × height
3D shapes — surface area & volume
- Cube: Total surface area = 6a², Volume = a³
- Cuboid: TSA = 2(lb + bh + hl), Volume = l × b × h
- Cylinder: Curved SA = 2πrh, Volume = πr²h
- Sphere: Surface area = 4πr², Volume = (4/3)πr³
- Cone: Curved SA = πrl, Volume = (1/3)πr²h
Units: length in cm, area in cm², volume in cm³. Use π = 22/7 or 3.14 as told in the question.