When calculating angles using a circle theorem, always state which theorem ... Tangents close tangentA straight line that just touches a point on a curve. A tangent to a circle is perpendicular ...

A tangent is a straight line which touches the circle at a point but does not cut through the circle. There are two theorems involving tangents. The angle between a tangent and a radius is 90°..

Using advanced mathematical tools inspired by physics, the team has derived a general equation for any number of tangent ...