Grade 9 | Building up Mathematics | Chapter 1 - Lines & Circles

Building up Mathematics for Grade Nine - Lebanese Program. Chapter 1 | Lines & Circles Teacher: Mazen -------------------------------------------------------------------------------------------------------------------------------------------------------- Property 1: If a line (d) is tangent to a circle C(O;r) at a point A, then (d) is perpendicular to (OA) at A. -------------------------------------------------------------------------------------------------------------------------------------------------------- Property 2: The line joining the center of a circle to a point A outside the circle is an axis of symmetry of the figure formed by this circle and the two tangents issued from A to this circle. -------------------------------------------------------------------------------------------------------------------------------------------------------- facebook:   / beirutacademy1   email: beirutacademy1@gmail.com -------------------------------------------------------------------------------------------------------------------------------------------------------- Subscribe and share among your friends and don't forget to click the bell to get notifications of new lessons. #Lines&Circles #Mathematics #BeirutAcademy