Construct angles on the circumference and at the centre from a common chord and examine.
How to use sliders in geometry to change lengths and angles.
Find the equation of the line through (2, -1) perpendicular to the line 5x – 2y +6 = 0.
How to change the labels of any Geometry object using the annotation tool – eg change triangle ABC to triangle PQR.
Create a triangle in Geometry, apply a matrix transformation to the vertices in Main and view the image back in Geometry.
Use an object and its transformed image in Geometry to determine the equivalent transformation matrix in Main.
Fast track your animation skills by animating a tangent line around a circle.
Examine the angle in the semi-circle using the Animation tool.
Examine sum of opposite pairs of angles using the Expression tool.