https://www.khanacademy.org/math/tg-math-class-7-bridge/x2648a6cb9a4fb7d5:2d-and-3d-shapes/x2648a6cb9a4fb7d5:polygons/v/what-are-polygons-ur 2025-08-07T23:47:30.929898503Z What are Polygons? Created by Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw What are Polygons? Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/qaFWkSmdZx8.mp4/qaFWkSmdZx8.mp4 194 Polygons https://www.khanacademy.org/math/tg-math-class-7-bridge/x2648a6cb9a4fb7d5:2d-and-3d-shapes/x2648a6cb9a4fb7d5:polygons/e/identify-regular-polygons 2021-07-02T22:45:31Z Identify regular polygons Name polygons and identify if they are regular and irregular. Lindsay exercise https://www.khanacademy.org/math/8th-grade-math-foundations/x750ad76fa628b190:measurement-and-geometry/x750ad76fa628b190:comparing-regular-and-irr/v/convex-and-concave-polygons-ur 2025-08-07T23:47:30.929898503Z Convex and Concave Polygons Created by Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Convex and Concave Polygons Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/a-9kPUQIalk.mp4/a-9kPUQIalk.mp4 208 Polygons https://www.khanacademy.org/math/class-9-geometry-od/x0a98afb01410c41a:quadrilaterals/x0a98afb01410c41a:polygons/e/concave-vs-convex--regular-vs-irregular-polygons-8th 2025-02-18T07:52:09.551150445Z Polygon types concave vs convex, regular vs irregular polygons supriya exercise https://www.khanacademy.org/math/geometry-home/geometry-shapes/angles-with-polygons/v/sum-of-interior-angles-of-a-polygon 2023-04-19T21:01:17.089483175Z Sum of interior angles of a polygon To find the interior angle sum of a polygon, we can use a formula: interior angle sum = (n - 2) x 180°, where n is the number of sides. For example, a pentagon has 5 sides, so its interior angle sum is (5 - 2) x 180° = 3 x 180° = 540°. Sal Khan video https://cdn.kastatic.org/googleusercontent/Dy9dwu-r7REqsvHnPJFG9BZyZgxZhkCsmdatuLMVhinf3RDOohVKv5QYloc5nPaMFXRcHpX97XgtX1-5mr9LXQ4xFA Sum of interior angles of a polygon To find the interior angle sum of a polygon, we can use a formula: interior angle sum = (n - 2) x 180°, where n is the number of sides. For example, a pentagon has 5 sides, so its interior angle sum is (5 - 2) x 180° = 3 x 180° = 540°. https://cdn.kastatic.org/ka-youtube-converted/qG3HnRccrQU.mp4/qG3HnRccrQU.mp4 550 Polygons https://www.khanacademy.org/math/geometry-home/geometry-shapes/angles-with-polygons/v/sum-of-the-exterior-angles-of-convex-polygon 2023-05-12T21:01:01.897246564Z Sum of the exterior angles of a polygon Learn a simple and elegant way to find the sum of the exterior angles of any convex polygon. You will see how to redraw the angles adjacent to each other and form a circle. Then you will discover that the sum of the exterior angles is always 360 degrees. Watch this video to master this important skill in geometry. Sal Khan video https://cdn.kastatic.org/googleusercontent/UC5fok88ogGOHxPgpquz_lcohc8q7cIY62SWTfzzJQATMpf7mmAbqUGP8cAnBW4xbNhV7LmbjdYqHsqz0heaI7kf Sum of the exterior angles of a polygon Learn a simple and elegant way to find the sum of the exterior angles of any convex polygon. You will see how to redraw the angles adjacent to each other and form a circle. Then you will discover that the sum of the exterior angles is always 360 degrees. Watch this video to master this important skill in geometry. https://cdn.kastatic.org/ka-youtube-converted/W9B3VYdC5T8.mp4/W9B3VYdC5T8.mp4 324 Polygons https://www.khanacademy.org/math/geometry-home/geometry-shapes/angles-with-polygons/e/angles_of_a_polygon 2026-03-24T23:41:07.080866137Z Angles of a polygon Find the sum of interior angles of different polygons. Sid Patel exercise https://www.khanacademy.org/math/up-class-7/xd7db71bfa990577e:quadrilaterals/xd7db71bfa990577e:quadrilaterals-10-b/e/quadrilaterals-10-b 2026-04-07T23:55:07.30621384Z Sum of interior angles of a polygon Quadrilaterals ashish exercise https://www.khanacademy.org/math/7th-grade-matatag/x065dcf1640354e81:1st-quarter/x065dcf1640354e81:angles/e/regular-polygons-formulae-8th 2025-02-18T07:52:09.551150445Z Interior and exterior angles of a polygon Regular polygons Formulae supriya exercise