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## Homework Statement

Hello, I've been trying to solve this problem, but in the examples that my teacher gave me didn't include something like this, I know how to calculate area but only if I have all the coordinates established.

I need to find the area using the cross product.

## Homework Equations

## The Attempt at a Solution

I know I must divide the polygon into triangles, so I can calculate the area.

I need a starting point for the coordinates.

For example I can call the starting point A.

A(0,0)

Then I need more coordinates in order to establish each vector.

B(0,1.03)

C(0,1.12)

After that...

AB = 0i + 1.03j

AC = 0i + 1.12j

CB = 0i + 2.15j

A=[itex]\frac{1}{2}[/itex](AB x AC)

If what I wrote above is right then I think I can solve It, but I'm almost absolutely sure that is wrong.

**I need to know how to declare each vector so I can calculate the area.**

I hope is clear enough, and thanks in advance for taking your time to read and help me with this problem.