This math video tutorial explains how to find the center and radius of a circle. It explains how to write the equation in standard form by completing the square. Conic Sections - Free Formula Sheet: Final Exam and Test Prep Videos: __________________________________ Conic Sections - Basic Introduction: Finding The Radius and Center of a Circle: Writing Equations and Graphing Circles: Writing Equations of Ellipses: Circumference of an Ellipse: Area of an Ellipse: ____________________________ Eccentricity of an Ellipse: Hyperbolas - Conic Sections: Parabolas - Focus and Directrix: How To Find the Vertex of a Parabola: Conic Sections Quiz: _____________________________ Arithmetic Sequences: Geometric Sequences: Probability - Basic Intro: Intro to Statistics: Final Exams and Videos Playlists: