SPACE1
We look at how to describe plane properties of stacks as area and diagonals by the 3 Greek Pythagoras’, mini, midi & maxi.
And by the 3 Arabic recount-equations:
sinA=a/c, cosA=b/c and tanA=a/b.
Then we look at how to describe spatial properties of solids such as surface and volume by formulas and by a 2-dimensional representation of 3-dimensional shapes.

Q: How to count plane and spatial properties of stacks and boxes and round objects?
A:

• By using a ruler, a protractor and a triangular shape.
• By the 3 Greek Pythagoras’, mini, midi & maxi
• By the 3 Arabic recount-equations: sinA = a/c, cosA = b/c, tanA = a/b