(4 stars)


Download for Android

100 - 500 downloads

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This free App is for learning the rule about angles; alternate angles, corresponding angles, three angles of triangle, inscribed angle and its central angle on circle. The value of the angles in questions is randomly programmed so that you can also practice about calculation.

The figure is drawn by computer program so that the accuracy is insured. Getting accustomed to geometry is important to learn about it. It seems easy, but don't miscalculate with questions and your life. Have fun!

If you have any questions, please feel free to contact to

This app uses phonegap technology, mobile application development framework.

Tags: geometry angle circle triangle.

Recently changed in this version

Three items are added.
1. Length (Pythagorean theorem)
2. Angle
3. Area (Triangle, rectangle and circle)
4. Geometry with Algebra. (Triangle figured by linear functions)

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