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January 27th, 2013, 06:53 PM  #1 
Newbie Joined: Jan 2013 Posts: 1 Thanks: 0  iOS App Recommendation:3D Protractor
This is an amazing tool to measure all kinds of angles in the 3D space just using your iPhone or iPad [attachment=0:nazy5rw1]IMG_1126.PNG[/attachment:nazy5rw1] This may be a reinvention of protractor! Before you find this app,what is your understanding of a protractor? Can measure angle between two lines on a plain? You are right. But,there are too many kinds of angles existed in our daily life that we are unable to measure just by the traditional protractor. Give some basic examples: How to measure the angle of an open door? How to measure the tilt angle of the Leaning Tower of Pisa? A some professional example: How to measure the angle of propeller blade. Obviously,if we want to measure such angles,we need some special tools. But now,this app brings new solution and solve the problems extremely easy! 3D Protractor,this protractor,can measure all kinds of angles in the 3D space!!! It is a very professional measure tool.if you have learned solid geometry,you should know dihedral angle. This App can measure it. In fact,it owns four powerful functions: 1,Vector Angle Measurement. It can measure the angle of any two vectors in the space,include the angle on a plain. 2,Slope Angle Measurement. 3,Dihedral Angle Measurement. 4,Line Face Angle Measurement. Besides,this amazing measure tool has really high precision. The precision can be less than 0.5 degree under normal quick measurement,which is absolutely fit the need of daily life and industry. Of course,if you are a teacher who teaches solid geometry,it is a really cool educational tool. It is an amazing app! Just try it now! Maybe you can use it to divide cake into odd pieces! 

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