Area of segmented point cloud

I'm trying to use Matlab to extract features from a point cloud. In particular after point cloud segmentation, I would like to calculate areas (and others geometrical features) of the segmented regions. Is it possible?

[Aditya Patil]

Can you share any code and error messages, so that we can better help you with your issue?

[Antonella Musicco]

I would like to calculate the area of green part segmented from an original point cloud as it's shown in the picture.