F2 maths...

一個等邊三角形AREA是開方3.找邊長.......


我計的方法:
h=height
x=邊長


h^2+(x/2)^2=x^2(Pyth.theorem)
h^2+(x^2/4)=x^2
h^2 =3x^2/4
h =sqrt3x^2/4
h =xsqrt3/2


(xsqrt3/2 x x)/2 =sqrt3
x^2sqrt3/2 =2sqrt3
x^2 =2sqrt3x(2/sqrt3)
x^2 =4
x =2

sqrt=開方
唔知自己有冇計錯..........