Najdu rovnici primky AC, (to bude nejak takhle: y=ax+b) a primky BD (y=cx+d). Cili az najdes cisla a,b,c,d, budes mit soustavu dvou rovnic o dvou neznamych
y=ax+b y=cx+d
A to uz je snadne
Nothing in the world that's worth having comes easy. Always do what you are most afraid of.