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

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

    18
  2. The cyclic quadrilateral formed by the bisectors of a quadrilateral | plane geometry | intermediate

    The cyclic quadrilateral formed by the bisectors of a quadrilateral | plane geometry | intermediate

    15
  3. The cyclic quadrilateral formed by the external bisectors of a quadr. | geometry | intermediate

    The cyclic quadrilateral formed by the external bisectors of a quadr. | geometry | intermediate

    33
  4. Segments at equal angles from the opposite sides of a cyclic quadrilateral | geometry | intermediate

    Segments at equal angles from the opposite sides of a cyclic quadrilateral | geometry | intermediate

    26
  5. Bisectors of angles between opposite sides of a cyclic quadrilateral | plane geometry | intermediate

    Bisectors of angles between opposite sides of a cyclic quadrilateral | plane geometry | intermediate

    25
  6. 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

    40
  7. Segments connecting midpoints of opposite arcs of circumcircle of quadril. | geometry | intermediate

    Segments connecting midpoints of opposite arcs of circumcircle of quadril. | geometry | intermediate

    25