I have gone through your problem.
There is a strong family history of colon cancer
in your family. Now you are having 3 polyps in your colon. Of course its always wise to do a biopsy before going for a definitive procedure. If the biopsy reveals benign (not cancer) nature of the polyps, then a simple snaring of the ploys may all be needed along with annual surveillance by colonoscopy
If the biopsy reveals suspicious of malignancy or malignant (cancer), then a colectomy
should be done. Before doing colectomy the tumor staging should be done. For that you may need a complete workup like CT scan
of the abdomen and pelvis to look for local extension and distant metastasis (especially in liver) and also CEA (colon cancer tumor marker