







A tangent to a circle 
20180610 

Bellle pose la question : Determine the equation of the circle which has its center at (3,1) and tangent 3x4y+5=0 Penny Nom lui répond. 





A circle is inscribed in a hexagon 
20151228 

Lalitesh pose la question : A circle is inscribed in a regular hexagon ABCDEF
Prove that AB+CD+EF=BC+DE+FA Penny Nom lui répond. 





A tangent line to a circle 
20150903 

Jamie pose la question : Use the Greek method to find an equation of the tangent line to the circle
x^2+y^24x+6y+4=0 at the points (3,2square root 23. Penny Nom lui répond. 





Two parallel tangents to a circle 
20150305 

Samantha pose la question : The equation of a circle is x^2+y^2=25. Determine
the equation of the parallel tangent lines to this
circle, for which the slope is 4/3. Penny Nom lui répond. 





A tangent to a circle 
20141222 

azman pose la question : Find the equation of the tangent line to the circle x^2+y^2=9 at the point P (2, square root of 5). Penny Nom lui répond. 





The tangent to a circle at a point on the circle 
20130222 

Andrew pose la question : What is the equation of the line tangent to the circle with equation x^2+y^2=25 at the point (4,3) Penny Nom lui répond. 





A tangent to a circle 
20110206 

debz pose la question : what is the formulae of the tangent to a circle.... our teacher gave us a lot of homework.. and she ask us to find the formulae by ourselves.. Penny Nom lui répond. 





How many bricks I can place around a 26inch circle? 
20080522 

Jon pose la question : I want to know how many bricks I can place around a 26inch circle? There must be a formula other than trial and error. The length of the bricks is 6inches. [How many 6inch tangents can be in a 26inch circle?
Thank you very much.
Jon Harley Weston lui répond. 

