To see a triangle in a dream refers to time, the decrease of time, time lag.
To draw a triangle in your dream means that you will come to the last stage in a job or homework which you started and you will complete your job without any trouble.
To see fruits and vegetables with triangle shaped in your dream may represent that the fortunes coming into your home will be very diverse and abundant as soon as possible.
To see commodities as the shape of triangle in your dream may suggest that you will use income you get soon for the change of your things.
To see a triangle drawn on the wall, ground in your dream refers to private or valuable goods which you will change soon.
To see triangle shapes on the objects such as carpet, rug in your dream may indicate that the time will decrease for a job which you have to finish and you should accelerate.