Unsupported browser

You are using an outdated browser. Please upgrade your browser to improve your experience.

Sign up for
an Award

Participate with your entry in one of our professional or student awards.

Sign up for an award

Sign up for
a Profile

Create your own profile and publish it in the iF WORLD DESIGN GUIDE.

Sign up for a profile

Learn more:

(free of charge)

Present your project for free and win your share of EUR 50,000 in prize money.

Publish your project

Circling / Compasses


When we use a compass, we always need to make sure the radius of the circle with the ruler, it is troublesome and inaccuracy. Circling combines a compass and a tape measure, on the basis of the characteristics of the isosceles triangle----the connection between two midpoints on the two waist is equal to half of the length of bottom line, you can acquire the radius more accuracy and quickly. You just need to pull the arms of the compass to find the corresponding length and multiply by 2, then you will get the correct length(which can be accurate to the millimeter).


Jiangnan University

Jiangnan University
wuxi, China


Jiangnan University

Jiangnan University
wuxi, China

Xuan Teng Huijun Chen