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Standard equation of a circle with 2 points?
Two points do not provide enough information to define a circle: a minimum of three points is required to uniquely define a circle unless one of the points happens to be the centre and the other is on the circle. In that case, however, it is necessary to know which is which.
If EF 6 and EG 21 find the value of FG?
There is not enough information to answer the question. For example, it is not even known if E, F and G are vertices of a triangle, three points on the same straight line, three points on the circumference of a circle or some exotic shape.
Is a circle named by two points in the circle?
It is typically named using one point, which is the center. Sometimes, a circle could be referred to "a circle with diameter AB" in which two points are named. However, you need three non-collinear points to uniquely determine a circle.
Three points lying on the same straight line are called?
Points on the same line are called collinear points.
Is it true that a circle and a line may have three points in common?
yes
