https://www.khanacademy.org/math/cc-third-grade-math/quadrilaterals-3rd/imp-quadrilaterals/v/introduction-to-types-of-quadrilaterals 2021-06-30T20:49:33Z Intro to quadrilaterals Sal discovers attributes and features of four-sided shapes, including parallelograms, rhombuses, rectangles, and squares. video https://cdn.kastatic.org/googleusercontent/USL90HJ9Vg4UpEx0HmZaM1EOPVJdmWZ8p7txFoF4pibbzlPR7Pr3rEqO8fvp3C9hkC_fAhqdcv4bwNVByjtUQM8 Intro to quadrilaterals Sal discovers attributes and features of four-sided shapes, including parallelograms, rhombuses, rectangles, and squares. https://cdn.kastatic.org/ka-youtube-converted/H-ykHosJW9c.mp4/H-ykHosJW9c.mp4 487 Quadrilateral: constructions and types https://www.khanacademy.org/math/class-9-tg/x06d55bfa213a79fd:quadrilaterals/x06d55bfa213a79fd:types-of-quadrilaterals/v/quadrilateral-types-indian-accent 2025-06-04T10:04:13.13703146Z Quadrilateral types Learn to identify quadrilaterals such as kites, trapezoids, parallelograms, rhombuses, rectangles, and squares by side length, presence of parallel sides, and angle type. Kalakrit (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Quadrilateral types Learn to identify quadrilaterals such as kites, trapezoids, parallelograms, rhombuses, rectangles, and squares by side length, presence of parallel sides, and angle type. https://cdn.kastatic.org/ka-youtube-converted/ZlQZ0EMCKhc.mp4/ZlQZ0EMCKhc.mp4 168 Quadrilateral: constructions and types 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 Quadrilateral: constructions and types 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 Quadrilateral: constructions and types 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 Quadrilateral: constructions and types 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 Quadrilateral: constructions and types 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 Quadrilateral: constructions and types https://www.khanacademy.org/math/revision-mh-math-class-8/x4e66a280e3e62582:week-2/x4e66a280e3e62582:quadrilateral-constructions-and-types/e/revision-quadrilateral-constructions-and-types-mh-class-8 2026-02-03T09:09:58.884796068Z Revision quadrilateral: constructions and types MH class 8 . Khan Academy exercise