Geometry 2D-Pad

Geometry 2D-Pad (Geometry Pad) is an application for iPad users, providing a set of tools in drawing and solving mathematics problems related to plane geometry. This application turns an iPad into an useful tool to form and construct figures from basic to complex in plane geometry such as points, straight lines, line segments, triangles, quadrangles, perpendiculars, medians (of a triangle)…etc. All that you need for Geometry subject

1) Drawing tools for basic figures (points, straight lines, segments, circles, triangles, rectangles, trapezoids, parallelograms,...etc.) and calculate their area, perimeter, length of sides, altitudes,...

2) Tools to construct figures based on a given point: to form a line segment with another point from a given point, to form a perpendicular to a straight line from a given point, to form a line parallel to a given straight line that passes through a given point, to form a circle which has a given point as its centre and passes through another point, to form a circle whose diameter is the line segment between a given point and another point…etc

3) Tools to construct figures based on a given line segment/straight line: to draw a perpendicular/parallel line to a given straight line, to lengthen a line segment, to draw a circle to which a given straight line is a tangent, to form a circle of which a given line segment is the diameter…etc.

4) Tools to construct figures based on a given circle: to draw a circle’s tangent, to draw a tangent circle to a given circle, to form a circular arc, to change the radius of a circle..etc.

5) Texting tools to name points/vertices in the figures or create text with geometric symbols: perpendicularity, parallelism, intersection, subset,...etc

6) Export the output figures in image file type and save to camera roll or share through email, Facebook or Twitter

更新履歴
The app is totally re-designed with more users-friendly interface and lots of new features:

1) Re-design users interfaces and interactions to make the app much easier to be used. Most of "drag and drop" actions replaced by single touch on the screens.

2) Now users can fill the shapes (circles, triangles, polygons) with the colors and add the captions to any object including triangles, circles, polygons.