Question

find the area of triangle whose sides are a=18 b=19 c=20 by using heroins formula ​

Answer 1

Answer:

155.45

Step-by-step explanation:

A=1

4﹣a4+2(ab)2+2(ac)2﹣b4+2(bc)2﹣c4=1

4·﹣184+2·(18·19)2+2·(18·20)2﹣194+2·(19·20)2﹣204≈155.44915