An apprentice went to a new building to measure the CHB wall area to be painted. He is equipped with Laser Distance Meter that measure the distance from that device to a wall (by means of reflected beam). The doors are of standard dimension while the ceilings are of same height. He started taking measurements 'inside' the building using the device. Unfortunately, the battery ran out after his 5th measurements and the area must be submitted to his boss soon. Nevertheless he used his acquired measurements to be able compute for the total CHB area.
Which measurements did he took? (pls. draw in above plan)