Rational points on circles centered at the origin
101835
Which rationals can be written as the sum of two rational squares?
152107
Classic Circle and Adjacent Arrangement Problem
155004
Maximal points on an $n$-dimensional ellipsoid
76611
Centre in N-sided polygon on circle
109767
Prove that three points are enough to draw/define one and only one circle
101734
$7$ points inside a circle at equal distances
83913
Rational solutions of Pell's equation
123426
Find the approximate center of a circle passing through more than three points
104548
Geometric proof for irrationality of $\pi$
158933
Rational solutions of $y^2 = x^3 - x$
101979
Set of open intervals in R with rational endpoints is a basis for standard topology on R
147429
Set of points in $\mathbb{C}$ s.t. $z^{n-1} = \overline z$
103575
Let $A,B,C,D,E$ be five points marked in clockwise direction on the unit crcle in the plane wth centre at origin.
85650
Number or regions formed when $n$ points on a circle are joined
103714
Progressively filled circles
95728
The union of growing circles is not homeomorphic to wedge sum of circles
15604
Determine the set of points $z$ that satisfy the condition $|2z|>|1+z^2|$