Lackland AFB - Main BX Lackland AFB TX Main Base Exchange san antonio TX 78236. Hours (Opening & Closing Times): Mon: 8:00 AM-9:00 PM Tue: 8:00 AM-9:00 PM Wed: 8:00 AM-9:00 PM Thu: 8:00 AM-9:00 PM Fri: 8:00 AM-8:00 AM Sat: 8:00 AM-9:00 PM Sun: 10:00 AM-8:00 PM. Phone Number: 800-782-7282.
Polygons are many-sided figures, with sides that are line segments. Polygons are named according to the number of sides and angles they have. The most familiar polygons are the triangle, the rectangle, and the square. A regular polygon is one that has equal sides.
Polygon Diagonals. The number of diagonals in a polygon = n(n-3)/2, where n is the number of polygon sides. For a convex n-sided polygon, there are n vertices, and from each vertex you can draw n-3 diagonals, so the total number of diagonals that can be drawn is n(n-3). However, this would mean that each diagonal would be drawn twice, (to and from each vertex), so the expression must be divided by 2.