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Tricky math puzzles geometry In this math learning video I (Susanne) explain how to calculate the length of the chord of a circle. We use the circumferential angle theorem (peripheral angle theorem) of a circle and set up equations using the cosine theorem for general triangles. We solve the system of equations using the equation method. Mathematics explained simply. 0:00 Introduction - math puzzles geometry 0:37 Drawing triangles 1:48 Circumferential angle theorem of a circle 5:01 Cosine theorem 9:23 Solving system of equations 13:27 Until the next video :) Become a channel member now and support my channel: ➤ https://www.youtube.com/mathematrick/... ???? ???? MY COMPLETE EQUIPMENT ➤ https://mathematrick.de/mein-equipment/ Feel free to support me with a few coins for a cup of tea! ???? ➤ https://www.paypal.me/MathemitSusanne ❤️ ABOUT ME ???? My Insta: @mathema_trick ???? My website: http://www.MathemaTrick.de ???? My email: [email protected] ???? My band: / moonsunband Address for business inquiries and fan mail: Susanne Scherer Gaustraße 8, F32 67655 Kaiserslautern Please send packages and parcels directly to the DHL Packstation: Susanne Scherer 1054501450 Packstation 179 67655 Kaiserslautern #Puzzle #Math #MathemaTrick