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  2. Perpendicular bisector construction of a quadrilateral

    en.wikipedia.org/wiki/Perpendicular_bisector...

    First iteration of the perpendicular bisector construction An equivalent construction can be obtained by letting the vertices of Q ( i + 1 ) {\displaystyle Q^{(i+1)}} be the circumcenters of the 4 triangles formed by selecting combinations of 3 vertices of Q ( i ) {\displaystyle Q^{(i)}} .

  3. Bisection - Wikipedia

    en.wikipedia.org/wiki/Bisection

    Because the construction of the bisector is done without the knowledge of the segment's midpoint , the construction is used for determining as the intersection of the bisector and the line segment. This construction is in fact used when constructing a line perpendicular to a given line at a given point: drawing a circle whose center is such ...

  4. Perpendicular bisector construction - Wikipedia

    en.wikipedia.org/wiki/Perpendicular_bisector...

    Perpendicular bisector construction can refer to: Bisection § Line segment bisector, on the construction of the perpendicular bisector of a line segment; Perpendicular bisector construction of a quadrilateral, on the use of perpendicular bisectors of a quadrilateral's sides to form another quadrilateral

  5. Straightedge and compass construction - Wikipedia

    en.wikipedia.org/wiki/Straightedge_and_compass...

    Constructing the perpendicular bisector from a segment; Finding the midpoint of a segment. Drawing a perpendicular line from a point to a line. Bisecting an angle; Mirroring a point in a line; Constructing a line through a point tangent to a circle; Constructing a circle through 3 noncollinear points; Drawing a line through a given point ...

  6. Special cases of Apollonius' problem - Wikipedia

    en.wikipedia.org/wiki/Special_cases_of_Apollonius...

    To construct the perpendicular bisector of the line segment between two points requires two circles, each centered on an endpoint and passing through the other endpoint (operation 2). The intersection points of these two circles (operation 4) are equidistant from the endpoints. The line through them (operation 1) is the perpendicular bisector.

  7. Constructions in hyperbolic geometry - Wikipedia

    en.wikipedia.org/wiki/Constructions_in...

    Construct the line segment BB' and using a hyperbolic ruler, construct the line OI" such that OI" is perpendicular to BB' and parallel to B'I". Then, line OA is the angle bisector for ᗉ IAI'. [3] Case 2c: IB' is ultraparallel to I'B. Using the ultraparallel theorem, construct the common perpendicular of IB' and I'B, CC'. Let the intersection ...

  8. Circle - Wikipedia

    en.wikipedia.org/wiki/Circle

    Construct the perpendicular bisector of the segment PQ. Construct the perpendicular bisector of the segment PR. Label the point of intersection of these two perpendicular bisectors M. (They meet because the points are not collinear). Construct the circle with centre M passing through one of the points P, Q or R (it will also pass through the ...

  9. Ultraparallel theorem - Wikipedia

    en.wikipedia.org/wiki/Ultraparallel_theorem

    Construct a point D on ray AE so that AD = A'D'. Then D' ≠ D. They are the same distance from r and both lie on s. So the perpendicular bisector of D'D (a segment of s) is also perpendicular to r. [1] (If r and s were asymptotically parallel rather than ultraparallel, this construction would fail because s' would not meet s.