The sum of the angles in a triangle?

Author:: GreenMaths

Topic:: Angles, Geometry

Move the slider GreenAngle to change the sizes of the angles. For different shapes of triangles what do you notice about the three angles? There are more things to try below.

New Resources

Open Middle Cyclic Quadrilateral Exercise
Simple Bridge (GeoGebra 3D Workshop)
Curry's Paradox: Version 4
Paradoxes on π
Open Middle Sector Area Exercise

Discover Resources

Square of a diference
Sine and Cosine
พีทาโกรัส
Area Function
Torque Beam

Discover Topics

Upper and Lower Sum or Riemann Sum
Curve Sketching
Line Segment
Optimization Problems
Correlation