Question

please maths ka all formula of class 10 dalo ​

Answer 1

$an = a + (n - 1) \times d \\ \\ sn = \frac{n}{2} \times (2a + (n - 1) \times d \\ \\ or \\ \\ sn = \frac{n}{2} \times (a + l)$

area of triangle = 1/2 (x¹(y²-y³)+x²(y¹-y³)+x³(y²-y¹)


area of sector =°/360 πr²