https://www.khanacademy.org/math/geometry/hs-geo-circles/hs-geo-tangents/v/proving-radius-is-perpendicular-to-tangent-line 2022-10-07T00:00:24.225559754Z Proof: Radius is perpendicular to tangent line Sal proves that the radius that connects the intersection point of a tangent line with the circle is perpendicular to the tangent line. video https://cdn.kastatic.org/ka_thumbnails_cache/34b0a898-d2a2-482b-8f82-1a9a124ef762_1280_720_base.png Proof: Radius is perpendicular to tangent line Sal proves that the radius that connects the intersection point of a tangent line with the circle is perpendicular to the tangent line. https://cdn.kastatic.org/ka-youtube-converted/St3MU5i3chc.mp4/St3MU5i3chc.mp4 521 Propiedades de la tangente https://www.khanacademy.org/math/geometry/hs-geo-circles/hs-geo-tangents/a/determining-if-a-line-is-tangent-by-looking-at-angles 2024-01-22T04:05:23.075087325Z Determining tangent lines: angles Solve two problems that apply properties of tangents to determine if a line is tangent to a circle. article https://www.khanacademy.org/math/geometry/hs-geo-circles/hs-geo-tangents/a/determining-if-a-line-is-tangent-by-looking-at-lengths 2022-09-10T02:03:40.164764806Z Determining tangent lines: lengths Solve two problems that apply properties of tangents to determine if a line is tangent to a circle. article https://www.khanacademy.org/math/geometry/hs-geo-circles/hs-geo-tangents/v/segments-tangent-to-circle-from-outside-point-congruent 2022-10-07T00:00:24.225559754Z Proof: Segments tangent to circle from outside point are congruent Sal proves that two tangent segments to a circle that are drawn from the same outside point are congruent. video https://cdn.kastatic.org/ka_thumbnails_cache/6d09b5ba-6aba-4edf-9153-b58e13735b67_1280_720_base.png Proof: Segments tangent to circle from outside point are congruent Sal proves that two tangent segments to a circle that are drawn from the same outside point are congruent. https://cdn.kastatic.org/ka-youtube-converted/pJABplruJIU.mp4/pJABplruJIU.mp4 236 Propiedades de la tangente https://www.khanacademy.org/math/geometry/hs-geo-circles/hs-geo-tangents/v/tangents-of-circles-exercise-examples 2022-10-07T00:00:24.225559754Z Tangents of circles problem (example 1) Sal finds missing angles using the property that tangents are perpendicular to the radius. video https://cdn.kastatic.org/ka_thumbnails_cache/ffdd13c3-687f-4a67-9cb7-37a9c7dba0b2_1280_720_base.png Tangents of circles problem (example 1) Sal finds missing angles using the property that tangents are perpendicular to the radius. https://cdn.kastatic.org/ka-youtube-converted/8vFhNhL-zm8.mp4/8vFhNhL-zm8.mp4 277 Propiedades de la tangente https://www.khanacademy.org/math/geometry/hs-geo-circles/hs-geo-tangents/v/measure-of-circumscribed-angle 2021-02-16T16:08:13Z Tangents of circles problem (example 2) Sal finds a missing angle using the property that tangents are perpendicular to the radius. Sal Khan video https://cdn.kastatic.org/googleusercontent/zIk6U1r0zx-sDeJtjdZ5HVzX8iVeQdQ9LFVT1U6hv8un3tT2iQbE2-5SDzEj90H27d8QpfOFacEKz8BjTX2iwrI Tangents of circles problem (example 2) Sal finds a missing angle using the property that tangents are perpendicular to the radius. https://cdn.kastatic.org/ka-youtube-converted/ZiqHJwzv_HI.mp4/ZiqHJwzv_HI.mp4 227 Propiedades de la tangente https://www.khanacademy.org/math/geometry/hs-geo-circles/hs-geo-tangents/v/example-with-tangent-and-radius 2021-02-16T16:08:13Z Tangents of circles problem (example 3) Sal finds a missing length using the property that tangents are perpendicular to the radius. Sal Khan video https://cdn.kastatic.org/googleusercontent/PHVUS7ueki6RvdNDEZpLJMXAaaMEXjdwNAVfyHxQ5iOXhD9XeEZkdPCGehcOGnvaICWUvFBVsFnX0lxGJ4Usxmvz2w Tangents of circles problem (example 3) Sal finds a missing length using the property that tangents are perpendicular to the radius. https://cdn.kastatic.org/ka-youtube-converted/KjQ1KN5GgoE.mp4/KjQ1KN5GgoE.mp4 154 Propiedades de la tangente https://www.khanacademy.org/math/geometry/hs-geo-circles/hs-geo-tangents/a/challenge-problems-radius-of-a-circle-with-a-tangent 2022-09-10T02:03:40.164764806Z Challenge problems: radius & tangent Solve two challenging problems that apply properties of tangents to find the radius of a circle with a tangent. article https://www.khanacademy.org/math/geometry/hs-geo-circles/hs-geo-tangents/e/central--inscribed--and-circumscribed-angles 2026-04-07T22:23:57.656416987Z Tangents of circles problems Solve problems related to tangents of circles. Sandy Knight exercise https://www.khanacademy.org/math/geometry/hs-geo-circles/hs-geo-tangents/a/challenge-problems-perimeter-of-circumscribing-shapes 2022-09-10T02:03:40.164764806Z Challenge problems: circumscribing shapes Solve two challenging problems that apply properties of tangents to find the perimeter of a circumscribing shape. article