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:


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

Publish your project

Roid protractor / protractor

Roid protractor

The description of function and possibility:For students,Protractor is an essential tool which is used to drawing and measuring angle,however,when we draw angle,we need to mark down a dot firstly in order to draw the angle properly,and secondly,we should connect the basic dot to another dot which we have marked by ruler.Maybe for most of students,this is very verbose and inefficiency.ROID protractor has a semicircular groove and simple shaft device,they can improve the needle to slide from 0°to 180°,so this kind of protractor is very convenient and accurate for user who need to draw angle than usual protractor.


Nanchang University

Nanchang University
NanChang, China

Yangbin Cui,
Nanchang university

Weitong Sun,
Nanchang university

Weiji Zhang,
Nanchang university

Yu‘an Shu,
Nanchang university

Go to profile