https://www.khanacademy.org/math/class-9-tg/x06d55bfa213a79fd:circles/x06d55bfa213a79fd:angle-subtended-by-a-chord-at-a-point/v/proof-when-two-chords-subtend-equal-angles-at-the-centre-the-chords-are-equal 2024-12-27T07:05:03.34880583Z Proof: When two chords subtend equal angles at the centre, the chords are equal Theorem: When two chords subtend an equal angle at the center the chords are equal in length. In this video we prove this statement using SAS test of congruency, and we use Manim to show beautiful animation. Devashish Phadnis video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Proof: When two chords subtend equal angles at the centre, the chords are equal Theorem: When two chords subtend an equal angle at the center the chords are equal in length. In this video we prove this statement using SAS test of congruency, and we use Manim to show beautiful animation. https://cdn.kastatic.org/ka-youtube-converted/OCNf1sBIwTs.mp4/OCNf1sBIwTs.mp4 187 Angle subtended by a chord at a point https://www.khanacademy.org/math/revision-term-1-od-math-class-10/x03e14a980a7a91ad:week-3/x03e14a980a7a91ad:circle/v/proof-equal-chords-subtend-equal-angles 2024-06-20T19:30:06.526648211Z Proof: Equal chords subtend equal angles In this video, we discuss the formal proof of the theorem which says that the equal chords that is the chords with same length subtend equal chord at the center of the circle. Devashish Phadnis video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Proof: Equal chords subtend equal angles In this video, we discuss the formal proof of the theorem which says that the equal chords that is the chords with same length subtend equal chord at the center of the circle. https://cdn.kastatic.org/ka-youtube-converted/vXFsXzXF-g4.mp4/vXFsXzXF-g4.mp4 207 Angle subtended by a chord at a point https://www.khanacademy.org/math/class-9-tg/x06d55bfa213a79fd:circles/x06d55bfa213a79fd:angle-subtended-by-a-chord-at-a-point/e/angles-inscribed-at-the-centre-by-a-chord 2026-04-07T22:23:57.656416987Z Angles inscribed at the centre by a chord this exercise is curated for new ncert and the problems are borrowed from 9.1 (circles) Devashish Phadnis exercise