Tangent 90 degrees to radius – GeoGebra

The angle between a tangent and a radius in a circle is 90° – GeoGebra

Circle theorems and geogebra

Eight circle theorems page

Each tangent is perpendicular to the radius that goes to the point of contact – GeoGebra

Basic Tangent Graph with transformations (degrees) – GeoGebra

Tangent Radius – GeoGebra

Trigonometry - The Unit Circle

trigonometrical Ratios of 90 degree – GeoGebra

Tangent is Perpendicular on Radius - by GeoGebra

Tangent radius property of a circle – GeoGebra