median
don steward
mathematics teaching 10 ~ 16

Saturday, 26 March 2011

rotating a rectangle

from Albert Renshaw's blog

what angles are the rectangles rotated through to form the regular polygons shown?

the rectangles are in the ratio 1 : 2; would rectangles with other dimensions work?

how could you form a regular octagon?

for the equilateral triangle it is not a simple rotation about the centre of the rectangle - how do you think the design was formed?

No comments: