# surfarea (\[\[x,y],\[x,y],\[x,y],\[x,y]])

**surfarea (\[\[x,y],\[x,y],\[x,y],\[x,y]]) → number**

It produces the resulting area formed by points entered sequentially, which together define a closed plane.

**Example:**

```xml
<O N="surfareaObject1" T="Project" Category="Functions" TransAlignRule="1">
    <!-- created by ParamML Examples on 8/24/2023 -->
    <P N="area" V="surfarea([[0,2],[2,2],[2,0],[0,0]])" />
</O>
```

![](https://openbrim.atlassian.net/wiki/download/attachments/2167996444/image-20230824-134932.png?api=v2) To view this example in the library, see (<https://openbrim.org/app/?incubator=1&author=ParamML_Examples_OpenBrIM+Platform&obj=objidnnomzcvpbqi9diww60lpz> )