Lianne
More ideas from Lianne
How A Hypotrochoid Is Made #Mechanism http://www.lifehack.org/articles/lifestyle/16-gifs-make-mechanism-expert.html?utm_term=0_983e966a3e-1fc3b054f7-415115113&utm_content=buffer119f8&utm_medium=social&utm_source=pinterest.com&utm_campaign=buffer

How A Hypotrochoid Is Made #Mechanism http://www.lifehack.org/articles/lifestyle/16-gifs-make-mechanism-expert.html?utm_term=0_983e966a3e-1fc3b054f7-415115113&utm_content=buffer119f8&utm_medium=social&utm_source=pinterest.com&utm_campaign=buffer

Here a line of fixed length is moved along the edge of an ellipse, tracing out a collection of new shapes. Consider the area of the shape traced by a point p units from one end of the line and q from the other. Holditch’s theorem, regarded as a milestone in the history of maths, tells us this area is less than the area of the ellipse by at least π×p×q. Curiously, this formula holds not just for an ellipse, but any closed curve. [more] [code]

Here a line of fixed length is moved along the edge of an ellipse, tracing out a collection of new shapes. Consider the area of the shape traced by a point p units from one end of the line and q from the other. Holditch’s theorem, regarded as a milestone in the history of maths, tells us this area is less than the area of the ellipse by at least π×p×q. Curiously, this formula holds not just for an ellipse, but any closed curve. [more] [code]

Draw a circle on a piece of paper, and a random point inside. If you continually fold points on the edge of the circle on top of the point inside, then the fold marks will combine to form the shape of an ellipse. [code] [more] [inspiration] [bonus]

Draw a circle on a piece of paper, and a random point inside. If you continually fold points on the edge of the circle on top of the point inside, then the fold marks will combine to form the shape of an ellipse. [code] [more] [inspiration] [bonus]

Very cool, fun art shading project from Art With  Mr. E.; he's an elementary art specialist. Try this with your kids (but I think grown ups would enjoy this too).

Very cool, fun art shading project from Art With Mr. E.; he's an elementary art specialist. Try this with your kids (but I think grown ups would enjoy this too).

http://regolo54.tumblr.com/ web plný fraktálů - kreslených

http://regolo54.tumblr.com/ web plný fraktálů - kreslených

Such an adorable riddle to help students remember the differences between mean, median, mode, and range!

Such an adorable riddle to help students remember the differences between mean, median, mode, and range!