GeoGebra Geometry

GeoGebra

About this app

Easily construct triangles, drag points, draw parallel lines, intersect circles, save and share your results. Millions of people around the world use GeoGebra to learn mathematics and science. Join us!

• Create constructions with points, lines, circles, polygons, and angles
• Explore interactive geometry by dragging points
• Measure lengths and areas
• Transform shapes by mirroring, rotating and dilating them
• Try advanced constructions with conics and locus lines
• Investigate construction steps to get deeper understanding
• Search for free learning activities directly from our app
• Save and share your results with others

We’d love to hear from you: send us your questions or feedback via Twitter @geogebra or to [e-mail]

Ratings and reviews

I don't see what this is for, can't find any actual helpful functions. Some menus can't be accessed because they are placed under the phones basic menu buttons, so maybe that's the issue. Really awkward UI overall. Can't set or even see values (those options seem to do nothing) so how could I do anything?

one thing is missing. or has error in it. when rotating a point about another point clockwise or anticlockwise there is only the option of rotating in degree. not in ° ' ". hence converting DMS in Degree truncates the small value of seconds. I want that feature in this app. please as soon as possible. thanks. I am a civil engineering student by the way.

Almost great. The actual app is great, once you get past the nearly impossible zoom controls. An example. Set line lengths will default to horizontal. Four digit inputs will have that line run a long way off screen on a phone. There is no zoom slider, at least not one I could find, nor a zoom -+ button. Pinch zooming will almost always result in one or two additional points being added instead of zooming. Fixing this would make it a 5 star app but, as is, it's unusable on a phone.

What’s new

• New feature: Autocomplete, which makes using commands easy and straightforward.
• You can now take pictures with your camera and insert them into your constructions.