Cambridge Maths Academy

수학 모음 (Maths collection) 전체보기 Heron's formula calculates the area of a triangle. Here, we will look at two different formulae describing the area of a triangle and then derive the third version, Heron's formula. $A=\frac12ah$ $A=\frac12ab\sin C$ Heron's formula: $A=\sqrt{s(s-a)(s-b)(s-c)}\,$ where $s=\frac{a+b+c}{2}$. s can be thought of as half the perimeter of the triangle. As we will see, the..