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.
Now let us put the center at (a,b) So the circle is all the points (x,y) that are r away from the center (a,b). Now lets work out where the points are (using a right-angled triangle and Pythagoras): It is the same idea as before, but we need to subtract a and b: (xâa)2 + (yâb)2 = r2.