11. 11. 201213 tis. zhlédnutíSubscribe Now:http://www.youtube.com/subscription_center EhowWatch More:http://www.youtube.com/EhowIn the world of geometry, lines and planes need t...
29. 7. 201626 tis. zhlédnutíThis is my channel trailer video. I help students pass difficult math and science courses such as general chemistry, algebra, geometry, physics, sat math, c...
14. 10. 202110 tis. zhlédnutíRolling ball sculpture / Marble Run made by Robert Kalinovich.Available for purchase here: https://www.etsy.com/ca/listing/1087751074/rolling-ball-sculpture...