Interior angle sum Post author By Rik D. Tangerman Post date December 18, 2020 No Comments on Interior angle sum In a polygon with n sides, the sum of the interior angles is 180*(n-2). ← Circle → Cevian Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment. Δ Optionally add an image (JPEG only)