Question

@ganeshie8

Answer 1

S = 1/2 AH . BC
I used distance formula and found BC.then i found AH an then i calculate it...

Answer 2

that works in this particular case, but wont work for all triangles right ?

Answer 3

yes :)
and do you have another proof?

Answer 4

we use the same idea uve used to prove the formula for ANY triangle

Answer 5

u wanto find the triangle area, given coordinates of its vertices

Answer 6

should we use Heron 's formula?

Answer 7

thats a good idea too,
find lengths of all sides using distance formula, and apply them in heron's formula

but after that u wud ask, how to prove heron's formula

Answer 8

thats why im thinking, not to use it ;)

Answer 9

so to prove sth we shouln't use any formula?

Answer 10

we can use formula that we know how to prove.
we dont knw how to prove heron's formula yet, so lets not use it

Answer 11

lets try to find it doing, exactly wat u have done in the starting