In this problem show that angle y = 120 degrees, given that a circle is inscribed in an equilateral triangle having three points of tangential contact. Relevant Video on tangent lines to circles (angle of contact is 90 degrees or a right angle): • Why is a Line Tangent to a Circle Perpendi... #inscribedpolygons #circles #equilateraltriangle #tangentline #angles #ishmathtestprepdouble #professorcalculish #geometry #trigonometry #mathtest #mathtestpreparation #inscribedcircle #rightangle