List of All Geometry Formulas - Summary
Understanding 2D and 3D Geometry
Geometry has special rules called formulas that help us find things like length, area, and volume. In 2D geometry, we look at flat shapes like squares, circles, and triangles. In 3D geometry, we look at solid shapes like cubes, balls (spheres), boxes (cuboids), and cones that take up space.
Why Geometry Formulas Are Important
Learning these formulas is very useful. They help us solve real-life problems, like finding out how much space a garden takes or how much water a tank can hold. It makes math more fun and helps us in everyday life!
List of All Geometry Formulas for Classes 6 to 12th
SHAPES | FORMULAS |
---|---|
1. Right Triangle | Pythagoras Theorem: a2 + b2 = c2 Area = ½ ab Perimeter = a + b + √(a2 + b2) Where, c = hypotenuse of a triangle a = altitude of a triangle b = base of a triangle |
2. Triangle | Perimeter, P = a + b + c Area, A = ½ bh Height, h = 2(A/b) Where, a,b,c are the sides of a triangle. |
3. Rectangle | Perimeter = 2(l + w) Area = lw Diagonal, d = √(l2 + w2) Where, l = length of a rectangle w = width of a rectangle |
4.Parallelogram | Perimeter, P = 2(a + b) Area, A = bh Height, h = A/b Base, b = A/h Where, a and b are the sides of a parallelogram h = height of a parallelogram |
5. Trapezium | Area, A = ½(a + b)h Height, h = 2A/(a + b) Base, b = 2(A/h) – a Where, a and b are the parallel sides h = distance between two parallel sides |
6. Circle | Circumference = 2πr Area = πr2 Diameter = 2r Where, r = radius of a circle |
7. Square | Perimeter, P = 4a Area, A = a2 Diagonal, d = a√2 Side, a = √A = d/2√2 Where, a = side of a square |
8. Arc | Arc Length, L = rθ Area, A = ½r2θ Here, θ is the central angle is radians. Where, r = radius |
9. Cube | Area, A = 6a2 Volume, V = a3 Edge, a = V⅓ Space diagonal = a√3 Where, a = side of a cube |
10. Cuboid | Surface Area, A = 2(lb + bh + hl) Volume, V = lbh Space diagonal, d = √( l2 + b2 +h2) Where, l= length b= breath h= height |
11. Cylinder | Total Surface Area, A = 2πrh + 2πr2 Curved Surface Area, Ac = 2πrh Volume, V = πr2h Base Area, Ab = πr2 Radius, r = √(V/πh) Where, r= radius of a cylinder h= height of a cylinder |
12. Cone | Total Surface Area, A = πr(r+l) = πr[r+√(h2+r2)] Curved Surface Area, Ac = πrl Volume, V = ⅓πr2h Slant Height, l = √(h2+r2) Base Area, Ab = πr2 Where, r= radius of a cone h= height of a cone l = slant height |
13. Sphere | Surface Area, A = 4πr2 Volume, V = ⁴⁄₃πr3 Diameter = 2r Where, r= radius of a sphere |
For your convenience, we have created a comprehensive PDF containing all these geometry formulas. You can download this PDF to help you study and revise effectively. Explore the world of geometry with the help of our easy-to-follow geometry formulas!