https://www.khanacademy.org/math/geometry-home/geometry-shapes/geometry-curves-and-polygons/v/polygons-as-special-curves-basic-geometrical-ideas-class-6-india-khan-academy 2020-09-30T07:51:31Z Polygons as special curves You may have learnt that triangles, rectangles etc. are all examples of polygons but that circles are not. What exactly makes a curve a polygon? Aanand Srinivas video https://cdn.kastatic.org/googleusercontent/ckRjsH6uJtzQAEOQ-13-vPvrWm1omm0P1j7-mEZDEXFc-yHR5i7-VP9Knj07Q2S7HoHokCB7vUFtVVEuf91ZjPG2 Polygons as special curves You may have learnt that triangles, rectangles etc. are all examples of polygons but that circles are not. What exactly makes a curve a polygon? https://cdn.kastatic.org/ka-youtube-converted/hGRu2Pyl92w.mp4/hGRu2Pyl92w.mp4 193 Polygons https://www.khanacademy.org/math/geometry-home/geometry-shapes/geometry-curves-and-polygons/e/open-and-closed-curves 2026-04-07T22:23:57.656416987Z Open and closed curves Let's spot the difference between an open and a closed curve. Aanand exercise https://www.khanacademy.org/math/revision-term-1-mh-math-class-7/x0bdc8a5f9d8ec377:week-2/x0bdc8a5f9d8ec377:angles-and-pairs-of-angles/v/sum-of-interior-angles-of-a-polygon-indian-accent 2025-06-05T09:01:06.799874579Z 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°. Kalakrit (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw 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/pGRFIuYY_cM.mp4/pGRFIuYY_cM.mp4 550 Polygons https://www.khanacademy.org/math/revision-mh-math-class-6/x01cb2212e31ce997:week-3/x01cb2212e31ce997:quadrilaterals/v/sum-of-the-exterior-angles-of-a-polygon-indian-accent 2025-06-05T09:01:06.799874579Z 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. Kalakrit (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw 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/J0cGIDWOOIo.mp4/J0cGIDWOOIo.mp4 324 Polygons 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 https://www.khanacademy.org/math/revision-mh-math-class-6/x01cb2212e31ce997:week-3/x01cb2212e31ce997:quadrilaterals/e/revision-quadrilaterals-mh-class-6 2026-01-28T03:50:33.306290623Z Revision quadrilaterals Mh class 6 . Khan Academy exercise