https://www.khanacademy.org/math/revision-mh-math-class-6/x01cb2212e31ce997:week-3/x01cb2212e31ce997:quadrilaterals/v/intro-to-quadrilaterals-indian-accent 2025-06-05T06:01:43.515132284Z Intro to quadrilaterals Lets discover attributes and features of four-sided shapes, including parallelograms, rhombuses, rectangles, and squares. Skyloom (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Intro to quadrilaterals Lets discover attributes and features of four-sided shapes, including parallelograms, rhombuses, rectangles, and squares. https://cdn.kastatic.org/ka-youtube-converted/oVokhHwU9aQ.mp4/oVokhHwU9aQ.mp4 460 Quadrilaterals https://www.khanacademy.org/math/cc-third-grade-math/quadrilaterals-3rd/imp-quadrilaterals/e/identify-quadrilaterals 2025-01-03T18:38:20.998556364Z Identify quadrilaterals Identify squares, rectangles, and rhombuses. Lindsay exercise https://www.khanacademy.org/math/cc-third-grade-math/quadrilaterals-3rd/imp-quadrilaterals/e/categorize-quadrilaterals 2025-02-27T11:46:16.621461116Z Analyze quadrilaterals Classify and compare rectangles, rhombuses, and squares. Erin Kats exercise https://www.khanacademy.org/math/cc-third-grade-math/quadrilaterals-3rd/imp-quadrilaterals/e/categorize-quads 2023-06-26T20:19:06.988565592Z Classify quadrilaterals  Recognize rhombuses, rectangles, and squares as examples of quadrilaterals, and recognize examples of quadrilaterals that do not belong to any of these subcategories. Lindsay exercise https://www.khanacademy.org/math/od-math-class-8-new-book/x648dc020d7206462:quadrilaterals/x648dc020d7206462:rectangles-and-squares/e/properties-of-rectangles 2026-01-14T04:19:20.590610231Z Properties of rectangles In this exercise students learn about the properties of rectangles as follows 1. The angles are all right angles (90°) 2. The opposite sides are of equal length. 3. The diagonals of a rectangle are equal and always intersect at their midpoints. 4. The opposite sides of a rectangle are parallel to each other. 5. Vertically opposite angles on diagonals are equal Khan Academy exercise https://www.khanacademy.org/math/od-math-class-8-new-book/x648dc020d7206462:quadrilaterals/x648dc020d7206462:rectangles-and-squares/e/square-and-its-properties 2026-01-14T04:19:20.590610231Z square and its properties In this exercise students learn about properties of squares and the relationship of squares with other quadrilaterals Khan Academy 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 Quadrilaterals 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/class-9-tg/x06d55bfa213a79fd:quadrilaterals/x06d55bfa213a79fd:properties-of-parallelograms/v/proof-opposite-sides-of-a-parallelogram-indian-accent 2025-06-04T10:04:13.13703146Z Proof: Opposite sides of a parallelogram Sal proves that a figure is a parallelogram if and only if opposite sides are congruent. Kalakrit (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Proof: Opposite sides of a parallelogram Sal proves that a figure is a parallelogram if and only if opposite sides are congruent. https://cdn.kastatic.org/ka-youtube-converted/gtDZ9hSKSUA.mp4/gtDZ9hSKSUA.mp4 509 Quadrilaterals https://www.khanacademy.org/math/class-9-tg/x06d55bfa213a79fd:quadrilaterals/x06d55bfa213a79fd:properties-of-parallelograms/v/proof-opposite-angles-of-a-parallelogram-indian-accent 2025-06-04T10:04:13.13703146Z Proof: Opposite angles of a parallelogram Sal proves that opposite angles of a parallelogram are congruent. Kalakrit (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Proof: Opposite angles of a parallelogram Sal proves that opposite angles of a parallelogram are congruent. https://cdn.kastatic.org/ka-youtube-converted/60-kf3Cluvc.mp4/60-kf3Cluvc.mp4 248 Quadrilaterals https://www.khanacademy.org/districts-courses/geometry-scps-pilot-textbook/x398e4b4a0a333d18:polygons-and-quadrilaterals/x398e4b4a0a333d18:properties-of-parallelograms/e/using-properties-basic-8th 2026-03-07T07:20:41.87360937Z Side and angle properties of a parallelogram (level 1) Side and angle properties of a parallelogram (level 1) supriya exercise https://www.khanacademy.org/districts-courses/geometry-scps-pilot-textbook/x398e4b4a0a333d18:polygons-and-quadrilaterals/x398e4b4a0a333d18:properties-of-parallelograms/e/diagonal-properties-of-quadrilaterals-8th 2026-04-07T22:59:30.107127435Z Side and angle properties of a parallelogram (level 2) Side and angle properties of a parallelogram (level 2) supriya exercise https://www.khanacademy.org/math/class-9-tg/x06d55bfa213a79fd:quadrilaterals/x06d55bfa213a79fd:diagonals-of-a-parallelogram/v/proof-diagonals-of-a-parallelogram-indian-accent 2025-06-04T10:04:13.13703146Z Proof: Diagonals of a parallelogram Sal proves that a quadrilateral is a parallelogram if and only if its diagonals bisect each other. Kalakrit (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Proof: Diagonals of a parallelogram Sal proves that a quadrilateral is a parallelogram if and only if its diagonals bisect each other. https://cdn.kastatic.org/ka-youtube-converted/9gAh2lFz5FI.mp4/9gAh2lFz5FI.mp4 547 Quadrilaterals https://www.khanacademy.org/districts-courses/geometry-scps-pilot-textbook/x398e4b4a0a333d18:polygons-and-quadrilaterals/x398e4b4a0a333d18:properties-of-parallelograms/e/regular-polygons-advanced-8th 2026-04-07T23:17:37.123726494Z Diagonal properties of parallelogram Polygons advanced supriya exercise https://www.khanacademy.org/math/revision-term-1-mh-math-class-8/x0c43044bb5624863:week-3/x0c43044bb5624863:quadrilateral-construction-and-types/v/rhombus-diagonals-indian-accent 2025-06-04T10:04:13.13703146Z Rhombus diagonals Sal proves that opposite angles of a parallelogram are congruent. Kalakrit (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Rhombus diagonals Sal proves that opposite angles of a parallelogram are congruent. https://cdn.kastatic.org/ka-youtube-converted/Hld2HXHe0X0.mp4/Hld2HXHe0X0.mp4 278 Quadrilaterals https://www.khanacademy.org/math/geometry/hs-geo-congruence/hs-geo-quadrilaterals-theorems/v/proof-rhombus-diagonals-are-perpendicular-bisectors 2021-02-16T16:08:12Z Proof: Rhombus diagonals are perpendicular bisectors Sal proves that the diagonals of a rhombus are perpendicular, and that they intersect at the midpoints of both. Sal Khan video https://cdn.kastatic.org/googleusercontent/LQrBnagaN7-w5xyWQkeeTmgHttSnMTyzZpXBuIeMI4XA5UGHycO2sqqb56yHNoMSYrMZOty8gt9jMCgCjXy2wmap Proof: Rhombus diagonals are perpendicular bisectors Sal proves that the diagonals of a rhombus are perpendicular, and that they intersect at the midpoints of both. https://cdn.kastatic.org/ka-youtube-converted/GDcVdBAnBdU.mp4/GDcVdBAnBdU.mp4 244 Quadrilaterals https://www.khanacademy.org/math/5th-grade-math-eureka-squared-aligned/xaf06646de8e27a4f:addition-and-multiplication-with-area-and-volume/xaf06646de8e27a4f:classify-kites-and-squares-based-on-their-properties/v/kites-as-a-geometric-shape-indian-accent 2025-06-04T10:04:13.13703146Z Kites as a geometric shape The video dives into the world of quadrilaterals, specifically focusing on kites. It explores how kites are defined by two pairs of adjacent, congruent sides. It also highlights that the diagonals of a kite intersect at a 90-degree angle, with one line bisecting the other. Kalakrit (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Kites as a geometric shape The video dives into the world of quadrilaterals, specifically focusing on kites. It explores how kites are defined by two pairs of adjacent, congruent sides. It also highlights that the diagonals of a kite intersect at a 90-degree angle, with one line bisecting the other. https://cdn.kastatic.org/ka-youtube-converted/-NWighBs6IU.mp4/-NWighBs6IU.mp4 338 Quadrilaterals