Hi Forum.

I have found a test with some strange questions, mainly lacking information.

So this is one of them

The diagonals of a parallelogram are 16 and 20; and one side of the parallelogram is 12. Find the area of the parallelogram.

Now, the thing is, we can calculate all of the measures.

using

But, how are we going to use it?

The proposed solution to this is to separate the parallelogram into 4 triangles.

2 types of triangles here, right?

We could use Heron's Formula in each triangle and then multiply it by 2.

The thing is, that this is an exam question, where time is limited, things can require a lot of work this way.

If we would have 4 equal triangles we would have a rhombus, wouldn't we?

But that is exactly what the solution does.

So, this probably doesn't have enough information,

Either that, or I am not used to the "side" word here.

Parallelograms and rectangles have differentsides, right?

That wouldn't mean that they are equal.

Can someone check if the way I am thinking is right?

Thanks a lot.