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  1. A Fun Geometry Problem | Find the Value of X in the Given Figure | Minute Math #geometry

    A Fun Geometry Problem | Find the Value of X in the Given Figure | Minute Math #geometry

    15
    6
    126
    1
  3. A theorem about two circles intersecting on the sides of a triangle | plane geometry | intermediate

    A theorem about two circles intersecting on the sides of a triangle | plane geometry | intermediate

    2
    0
    18
    1
  4. Tangential quadrilaterals, the sums of opposite sides, Pitot's theorem | plane geometry | elementary

    Tangential quadrilaterals, the sums of opposite sides, Pitot's theorem | plane geometry | elementary

    36
  5. The angle intersecting a circle with the vertex inside the circle

    The angle intersecting a circle with the vertex inside the circle

    12
  6. The angle intersecting a circle with the vertex outside of the circle

    The angle intersecting a circle with the vertex outside of the circle

    12
  7. The nine-point circle and the Euler line | plane geometry | advanced level

    The nine-point circle and the Euler line | plane geometry | advanced level

    20
  8. A tangent to a circle is perpendicular to the radius at the tangency point

    A tangent to a circle is perpendicular to the radius at the tangency point

    29
    1
  12. The two tangents to a circle from a point are equal to each other | plane geometry | elementary lev.

    The two tangents to a circle from a point are equal to each other | plane geometry | elementary lev.

    58
  13. Cyclic quadrilaterals (= inscribed quadrilaterals) | plane geometry | elementary level

    Cyclic quadrilaterals (= inscribed quadrilaterals) | plane geometry | elementary level

    20
  14. The tangential quadrilateral formed by centers of 4 tangent circles | plane geometry | intermediate

    The tangential quadrilateral formed by centers of 4 tangent circles | plane geometry | intermediate

    12
  15. Cyclic quadrilateral formed by inscribed angle from the midpoint of an arc | geometry | intermediate

    Cyclic quadrilateral formed by inscribed angle from the midpoint of an arc | geometry | intermediate

    44
  17. Segments between tangency points on opposite sides of a quadrilateral | geometry | intermediate

    Segments between tangency points on opposite sides of a quadrilateral | geometry | intermediate

    26
    1
  19. Viviani's theorem

    Viviani's theorem

    20
  20. Reflections of orthocenter with respect to sides of triangle | plane geometry | intermediate level

    Reflections of orthocenter with respect to sides of triangle | plane geometry | intermediate level

    36
  21. The Lemoine point of a triangle | plane geometry | advanced level

    The Lemoine point of a triangle | plane geometry | advanced level

    58
  22. The symmedians and the tangential triangle of a triangle | plane geometry | advanced level

    The symmedians and the tangential triangle of a triangle | plane geometry | advanced level

    92
  24. Biography of Abu Nasri Mansur ibn Ali ibn Iraq سوانح حیات ابو نصری منصور ابن علی ابن عراق

    Biography of Abu Nasri Mansur ibn Ali ibn Iraq سوانح حیات ابو نصری منصور ابن علی ابن عراق

    49
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