We can use compass and setsquare to draw circunferences given the endpoints, three points or a centre and a tangent.
Drawing a circumference given by the endpoints A and B of one of its diameters: Draw the perpendicular bisector of the segment AB to find the center of the circumference 0. Draw the circumference with its centre in 0 and radius 0B=0A.
Drawing the circumference given by the centre 0 and a tangent r. Draw an arc with its centre at 0 that intersects the line r in two points A and B. Draw the perpendicular bisector of the segment AB that give you a point T in the straight line r. Draw the circumference with its centre in 0 and radius 0T.
Drawing a circumference that passes through three points:
Voluntary task. Draw arches in Gotic Cathedrals:
Drawing a circumference given by the endpoints A and B of one of its diameters: Draw the perpendicular bisector of the segment AB to find the center of the circumference 0. Draw the circumference with its centre in 0 and radius 0B=0A.
Drawing the circumference given by the centre 0 and a tangent r. Draw an arc with its centre at 0 that intersects the line r in two points A and B. Draw the perpendicular bisector of the segment AB that give you a point T in the straight line r. Draw the circumference with its centre in 0 and radius 0T.
Drawing a circumference that passes through three points:
Voluntary task. Draw arches in Gotic Cathedrals:
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