?????????? inside angel ????????? . . . thats just the "angel" .......... depend on wot yuno at the start . .. . if huever dont tell yu NE angel, me put longest side as base . . . base=horizontal line along x-axis . . . yukan get area from herons area... area=sq root[s*(s-side1)*(s-side2)*(s-side3)] . . . s=half-rinleng=(side1+side2+side3)/2 . . . then, area=base*hite/2...yuze this tu get hite . . . then hite=(left-side)*sine(left-angel) tu get left-side . . . same thang for rite-side & rite angel