https://www.khanacademy.org/math/geometry/hs-geo-congruence/hs-geo-bisectors/v/constructing-an-angle-bisector-using-a-compass-and-straightedge 2021-02-16T16:08:13Z Geometric constructions: angle bisector Sal constructs a line that bisects a given angle using compass and straightedge. Sal Khan video https://cdn.kastatic.org/googleusercontent/k0ShVOtWKk8bpYbdkwztYCR_s299KJ7K2IC6cbiEn3WNlW88vonoAm9h67WtxvGHEFGXes-Y5in6opSJHr702xMy Geometric constructions: angle bisector Sal constructs a line that bisects a given angle using compass and straightedge. https://cdn.kastatic.org/ka-youtube-converted/KNr52iFk7n4.mp4/KNr52iFk7n4.mp4 137 Geometrical constructions https://www.khanacademy.org/math/geometry/hs-geo-congruence/hs-geo-bisectors/v/constructing-a-perpendicular-bisector-using-a-compass-and-straightedge 2021-02-16T16:08:13Z Geometric constructions: perpendicular bisector Sal constructs a perpendicular bisector to a given line segment using compass and straightedge. Sal Khan video https://cdn.kastatic.org/googleusercontent/Bjfj2eM1niFGunZY-P1N3CxVS8HNTbRplbz-yjCosmkaJsSoTSa0ZldRXgPIS1fvnMhp540o38QZpOuL7RA2JUg Geometric constructions: perpendicular bisector Sal constructs a perpendicular bisector to a given line segment using compass and straightedge. https://cdn.kastatic.org/ka-youtube-converted/WR2R_wrdEVY.mp4/WR2R_wrdEVY.mp4 86 Geometrical constructions https://www.khanacademy.org/math/geometry/hs-geo-circles/hs-geo-circum-in-circles/v/constructing-circle-inscribing-triangle 2021-02-16T16:08:13Z Geometric constructions: triangle-inscribing circle Sal constructs a circle that inscribes a given triangle using compass and straightedge. Sal Khan video https://cdn.kastatic.org/googleusercontent/dSGGzwnFFgLNPewAYoJik11-b_ZKtrzE1q3zd2MTV68XSFQOMk6VaZz-OUtn4KpiyhKiPBP7qloW55eOxFeQnQI Geometric constructions: triangle-inscribing circle Sal constructs a circle that inscribes a given triangle using compass and straightedge. https://cdn.kastatic.org/ka-youtube-converted/lmm767eIsGU.mp4/lmm767eIsGU.mp4 153 Geometrical constructions https://www.khanacademy.org/math/geometry/hs-geo-circles/hs-geo-circum-in-circles/v/constructing-circumscribing-circle 2021-02-16T16:08:13Z Geometric constructions: triangle-circumscribing circle Sal constructs a circle that circumscribes a given triangle using compass and straightedge. Sal Khan video https://cdn.kastatic.org/googleusercontent/V0uKUGvEasjML5uvY7GatUOHQWwIAk2a4xLm96HvKFrvB1pMwAyWu-hABihWDpXvR_BidO3JiJTaXKHzQNIUC_Qj Geometric constructions: triangle-circumscribing circle Sal constructs a circle that circumscribes a given triangle using compass and straightedge. https://cdn.kastatic.org/ka-youtube-converted/eSjbEWb4Qp4.mp4/eSjbEWb4Qp4.mp4 142 Geometrical constructions https://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-geometry/cc-7th-constructing-geometric-shapes/v/constructing-triangles-with-constraints 2021-06-30T20:49:37Z Construct a triangle with constraints Here's a challenge: in this problem we are given constraints and asked to construct a triangle. It can be done! You'll learn about degenerate triangles, too. Sal Khan video https://cdn.kastatic.org/googleusercontent/8QJGN2mqMMqvYB8ggWc1XozqdQaRPF-AHhMHiAkYM_hDxwOJ8p5DYL3UVFenVO639rtOnY9WDn0xyfYpaNF5XjOF Construct a triangle with constraints Here's a challenge: in this problem we are given constraints and asked to construct a triangle. It can be done! You'll learn about degenerate triangles, too. https://cdn.kastatic.org/ka-youtube-converted/E78ji1uBtSA.mp4/E78ji1uBtSA.mp4 239 Geometrical constructions https://www.khanacademy.org/math/class-7-ncf/x063f95a40c290960:a-tale-of-three-intersecting-lines/x063f95a40c290960:properties-of-triangles-part-1/v/construction-with-two-angles-and-sides-given 2025-07-22T04:52:18.174412386Z Construction with two angles and side given Learn how to construct a triangle when two angles and the side between them are given, using just a compass and ruler. This video shows each step clearly so you can follow along easily. You’ll also see how to construct 75° and 45° angles without a protractor, and understand why each step works the way it does. A great way to build your skills and confidence in triangle constructions! Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Construction with two angles and side given Learn how to construct a triangle when two angles and the side between them are given, using just a compass and ruler. This video shows each step clearly so you can follow along easily. You’ll also see how to construct 75° and 45° angles without a protractor, and understand why each step works the way it does. A great way to build your skills and confidence in triangle constructions! https://cdn.kastatic.org/ka-youtube-converted/s19exN2jjSo.mp4/s19exN2jjSo.mp4 326 Geometrical constructions https://www.khanacademy.org/math/geometry/hs-geo-congruence/hs-geo-trans-and-congruence/v/segment-congruence-equivalent-to-having-same-length 2022-09-10T02:03:40.164764806Z Segment congruence equivalent to having same length Two line segments are congruent if and only if they have equal lengths video https://cdn.kastatic.org/ka_thumbnails_cache/b1b1bba3-1983-45a6-beb2-194c246cfa9d_1280_720_base.png Segment congruence equivalent to having same length Two line segments are congruent if and only if they have equal lengths https://cdn.kastatic.org/ka-youtube-converted/WDHW-VZK3YI.mp4/WDHW-VZK3YI.mp4 405 Geometrical constructions https://www.khanacademy.org/math/geometry/hs-geo-congruence/hs-geo-trans-and-congruence/v/angle-congruence-equivalent-to-having-same-measure 2022-09-10T02:03:40.164764806Z Angle congruence equivalent to having same measure Two angles are congruent if and only if they have the same measure. video https://cdn.kastatic.org/ka_thumbnails_cache/405152dc-1a5b-4e9e-ae18-d9b7cb5ee767_1280_720_base.png Angle congruence equivalent to having same measure Two angles are congruent if and only if they have the same measure. https://cdn.kastatic.org/ka-youtube-converted/t41aV0XkYPQ.mp4/t41aV0XkYPQ.mp4 323 Geometrical constructions https://www.khanacademy.org/math/revision-mh-math-class-7/xa11c0f43538c6736:week-1/xa11c0f43538c6736:geometrical-constructions/e/revision-geometrical-constructions-mh-class-7 2026-01-28T03:50:33.306290623Z Revision geometrical constructions MH class 7 . Khan Academy exercise