Chris Sangwin

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5:16

How round is your circle?! www.howround.com

Chris Sangwin

Shared 17 years ago

1.5M views

3:54

How do you measure the area of Yorkshire (www.howround.com)

Chris Sangwin

Shared 17 years ago

7.4K views

3:40

How round is your circle?! (www.howround.com)

Chris Sangwin

Shared 17 years ago

20K views

0:22

The super egg (www.howround.com)

Chris Sangwin

Shared 17 years ago

8.4K views

0:18

The two-tip tetrahedron (www.howround.com)

Chris Sangwin

Shared 17 years ago

2.7K views

0:30

The uni-stable polyhedron (www.howround.com)

Chris Sangwin

Shared 17 years ago

5.8K views

0:31

Solids of constant width (www.howround.com)

Chris Sangwin

Shared 17 years ago

45K views

0:52

Rolling ellipses (www.howround.com)

Chris Sangwin

Shared 17 years ago

5.2K views

0:31

Rolling discs (www.howround.com)

Chris Sangwin

Shared 17 years ago

5K views

0:21

Sarrus's linkage (www.howround.com)

Chris Sangwin

Shared 17 years ago

35K views

0:23

Peaucellier's linkage (www.howround.com)

Chris Sangwin

Shared 17 years ago

134K views

0:16

Two shapes which roll along together... (www.howround.com)

Chris Sangwin

Shared 17 years ago

1.8K views

0:26

Dudeney's dissection (www.howround.com)

Chris Sangwin

Shared 17 years ago

39K views

0:20

Peaucellier's linkage in an alternative form (www.howround.c

Chris Sangwin

Shared 17 years ago

25K views

0:26

Chebyshev's linkage - alternative form (www.howround.com)

Chris Sangwin

Shared 17 years ago

47K views

0:24

Hart's straight line (www.howround.com)

Chris Sangwin

Shared 17 years ago

43K views

0:29

Hart's A-frame for drawing a straight line. (www.howround.co

Chris Sangwin

Shared 17 years ago

3.9K views

0:29

Drilling a square hole! (www.howround.com)

Chris Sangwin

Shared 17 years ago

279K views