Protractor Angle Demo

Author:rcsellers

Just a quick demonstration of why there are two scales on a protractor. Many students don't seem to have a good conceptual grounding in how they should reason through which scale to use.

New Resources

Constructing the Perpendicular Line Through a Point Not on the Line
Constructing the Midpoint and the Perpendicular Bisector of a Segment
VIDEO: How to Insert Image in GeoGebra
Simple 2D Vector Field
Example of using color palette

Discover Resources

Construction-Angle Bisectors
စတုရန်းဧရိယာကိုရှာခြင်း
Length vs. Time - Sim to Sim - Quad 6
Luminous Intensity vs. Length - Sim to Sim - Linear 1
Tracing Out Surfaces in 3D

Discover Topics

Power Functions
Poisson Distribution
Plane Figures or Shapes
Tangent Function
Parallelogram