elementary

sonom


  • 1. quadrilaterals
  • 2. a math trick-3
  • 3. triangle angle-sum theorem
  • 4. a triangle
  • 5. tux walks up and down...
  • 6. measuring angles...
  • 7. angles between parallels...
  • 8. area of a triangle
  • 9. area of a parallelogram
  • 10. area of a kite
  • 11. area of a trapezoid
  • 12. reflections...
  • 13. classifying triangles...
  • 14. reflections-2
  • 15. reflections-4
  • 16. find the area
  • 17. cartesian system
  • 18. axis of symmetry
  • 19. point of symmetry
  • 20. congruent triangles
  • 21. construction of a triangle (sss)
  • 22. Kaleidoscope
  • 23. a clock(2)
  • 24. supplementary angles
  • 25. find LCM and GCD
  • 26. quadrilaterals-2
  • 27. convex quadrilaterals
  • 28. a multiplication table
  • 29. equations and problems
  • 30. make an angle
  • 31. circumference of circles-1
  • 32. tangram puzzle-1
  • 33. multiplication table-1
  • 34. fraction αddition
  • 35. fraction division:　a ÷ b (partitive)
  • 36. fraction multiplication
  • 37. comparing fractions
  • 38. subtraction of proper fractions
  • 39. russian multiplication
  • 40. a math trick-31
  • 41. ferris wheel
  • 42. wheel of fortune-1
  • 43. newton's disk
  • 44. a wheel of fortune-1
  • 45. fraction to decimal
  • 46. parallels or not?
  • 47. lines through a point
  • 48. rolling a dice
  • 49. egyptian system of numeration
  • 50. rolling two dice

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quadrilaterals

the properties of quadrilaterals
– sonom

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