Small hollow circle in math, smaller than \circ
112107
Change existing symbol size
130665
Determine radius of a rounded rectangle
675
Calculate the radius of a circle given the chord length and height of a segment
124830
How do I create a circle or square with just CSS - with a hollow center?
100939
Circle with two borders
140939
Smallest Perfect Cube ending in 888
79983
Finding the exact area of a circle?
113566
\subseteq + \circ as a single symbol ("open subset")
95136
Finding center and radius of circumscribed triangle
83402
equation of a circle that has a radius of $\sqrt{10}$
130272
ggmap: create circle symbol where radius represents distance (miles or km)
40650
Equation for testing if a point is inside a circle
88769
Image of complex circle under polynomial
37642
Why is $\pi$ irrational if it is represented as $C/D$?
158007
To inscribe a circle in a given triangle
152107
Classic Circle and Adjacent Arrangement Problem
126799
Calculating the area of a polygon with equal sides inscribed in a circle with radius r.