Working out sq m in a room

[malawhap]

Hi all
If my room measured

1.9 x 1.7
1.2 x 2.2
1.7x2.1
1.8x1.77

Am i right in making the sq meters for this room 12.5 square meters?

 

[devonmark]

yep..well 12.6m2, don't forget to allow for wastage..10% typically..mark