Exam Questions - Circles | ExamSolutions Equation of a circle Equation of a tangent to a circle Coordinate Geometry - Circle, Tangents : C2 Edexcel January 2011 Q9 : ExamSolutions Maths Revision - youtube Video A Hard Geometry Problem on circle - Stack Exchange A Hard Geometry Problem on circle. Ask Question Asked 2 years, 5 months ago. do i find $\angle(ODC)$? so i wanted to show my teacher this but his not available yet. Can someone help me to solve? geometry problems which on circle seems hard to me. Thanks! geometry circles. share Browse other questions tagged geometry circles or ask your Grade 8 Problems and Questions on Circles with Answers Grade 8 Problems and Questions on Circles with Answers. Circle problems and questions with answers for grade 8 are presented. These problems and questions deal Geometry Problems and Questions with Answers for Grade 9 Geometry Problems and Questions with Answers for Grade 9. Grade 9 geometry problems and questions with answers are presented. These problems deal with finding the areas and perimeters of triangles, rectangles, parallelograms, squares and other shapes. Challenge problems: radius & tangent (article) | Khan Academy Solve two challenging problems that apply properties of tangents to find the radius of a circle with a tangent. A hard geometry problem on circles - Mathematics Stack A hard geometry problem on circles. Ask Question Asked 6 years, 5 months ago. (-1,0)$ on the unit circle). Edit #3: OK, it turns out one has to be a bit more careful than I was. Browse other questions tagged geometry circles or ask your own question.