When you are clear with the logic behind every formula, solving any kind of problem becomes easier. If you are perfect with all the below-mentioned formulas in Maths for Class 9 are listed chapter-wise, nothing can stop you from scoring maximum marks in the final examination.
Geometry
| Geometry Shapes Formulas for Class 9 | ||
|---|---|---|
| Geometric Figure | Area | Perimeter |
| Rectangle | A= l × w Here, l= length and w= breadth | P = 2 × (l+w ) |
| Triangle | A = (1⁄2) × b × h Here, b= base and h= height | P = a + b + c Here, a,b,c are the sides of the triangle |
| Trapezoid | A = (1⁄2) × h × (b1+ b2) Here, b1, b2 are length of parallel sides of trapezoid. | P = a + b + c + d a,b,c,d are the sides of the trapezoid |
| Parallelogram | A = b × h Here, b= base and h= height | P = 2 (a+b) a and b are the sides of the parallelogram |
| Circle | A = π r2 Here, r= radius of cicle | C = 2 π r |