Examine sum of opposite pairs of angles using the Expression tool.

Basic settings in the Sequence application.

Create the sequence of Triangle Numbers using an explicit definition, and graph the first 12 terms.

Create an arithmetic sequence, then a geometric sequence, also finding the sums of the GP.

Create the Fibonacci Sequence, graph the first 10 terms and find the ratio of conscutive terms.

Draw a simple triangle and learn how to measure angles, sides, area and perimeter.

Construct a right triangle and measure angles, sides, area and perimeter.

Construct and solve triangle ABC given two sides and the included angle.

Construct and solve triangle ABC given two sides and a non-included angle.

Construct and solve triangle ABC given all three sides.