Which Triangle will have a bigger area?

You all must be familiar with triangles right?
Here is a question that you must figure out to put your skills to test.
Between the following two triangles,
which one do you think will have a bigger area?
A) A triangle with dimensions 300, 400 and 700
B) A triangle with dimensions 300, 400 and 500

Click here for Answer

B will have bigger area since Triangle A is not possible to draw.