Area Scale Factors
Move the slider to see the effect of different length scale factors on their areas.
How could you calcluate the effect of using a scale factor of 9 or 10? What happens to the areas?
Incenter and Excenters
geogebra modul 4
Projection of a point on a plane and normal to plane
All Trig functions on unit circle
Optional Challenge (1)
trigonometry in the unit circle
C1 Ex3E Q4
Exploring cosine in a 30,60,90 triangle
Line between two points