Thursday, January 26

Theme Question:Who first showed the earth was a sphere?

Show video on PT.
Area of triangles = 1/2 bh
Area of parallelogram= bh
Scaling: a linear scale change of r gives area change of factor r2.
3 questions: running, moat, wind power...
Proof of the PT: Similar right triangles: c= a2 /c + b2 /c .

To be continued next class!