📐 Triangle Toolkit
Visual, interactive applets that help students master key triangle formulas — perfect for direct instruction or student exploration.
🔺 Area of a Triangle (SAS)
Explore how two sides and an included angle determine the area of any triangle — with color-coded visuals and a calculation check.
🟣 Sine Rule – Find a Side
Calculate a missing side using the sine rule with this interactive triangle applet.
🟣 Sine Rule – Find an Angle
Explore how to determine missing angles in a triangle using the sine rule.
🟢 Cosine Rule – Find a Side
Use the cosine rule to solve for a missing side when you know two sides and the included angle.
🟢 Cosine Rule – Find an Angle
Apply the cosine rule to determine unknown angles in triangles when all sides are known.