Question

Prove that A,B AND C are three points in space ,then the area of triangle ABC can be calculated with formular: Area of triangle ABC =1/2ABSOLUTE AB *AC

Answer 1

This only works for right triangles.



What grade are you in?

Answer 2

If you're in grade ~11, I think you should have learned the Sine Area Law. Google the proof to it.

In any case, the question is wrong.

Answer 3

No its not