VG1
geometri
Quiz
Area and volume — the key formulas
Here you will find the most important formulas for area and volume — from simple rectangles to cylinders and spheres, all in one place.
Area — 2D shapes
| Shape | Formula |
|---|---|
| Square | A = s² |
| Rectangle | A = l · w |
| Triangle | A = (b · h) / 2 |
| Circle | A = π · r² |
| Trapezoid | A = (a+b) · h / 2 |
Volume — 3D shapes
| Shape | Formula |
|---|---|
| Cube | V = s³ |
| Rectangular prism | V = l · w · h |
| Cylinder | V = π · r² · h |
| Sphere | V = (4/3) · π · r³ |
| Cone | V = (1/3) · π · r² · h |
Remember: π ≈ 3.14159 — use the π button on your calculator for precision.
Eureka! — I have found it! It is with geometry that we measure the world, and with numbers that we understand it.
— Archimedes (287–212 BC)
🧠 Test yourself
Question 1 of 3
What is the area of a circle with radius 5?