Most famous medieval cathedrals are in Europe (where the Christians were), and they were built between about 1000 and 1600 AD, during the Middle Ages. There are cathedrals all over Europe, in Spain, in England, in France, in Germany, and in Italy. The architecture of cathedrals is based on the old Roman basilica.
3 years ago. Hint: If you want PA = PB = PC all to be true, then you have to construct a circumcircle....which is done by finding the perpendicular bisector of AB, BC, and AC. ganeshie8.
7.1 Alternative Characterization. Assume given a point F in the plane, a line d not going through F, and a positive real number e. The set of points P such that the distance PF is e times the distance from P to d (measured along a perpendicular) is a conic. We call F the focus, d the directrix and e the eccentricity of the conic. If e e =1 a parabola, and if e 1).