Interactive geometry software specially developed for
the iPhone, iPad, and
The first construction is a regular hexagon given its center and one vertex. The second construction is the nine-point circle.
The iPhone is a line of Internet and multimedia-enabled smartphones designed and marketed by Apple Inc., and released in 2007. An iPhone functions as a camera phone (also including text messaging and visual voicemail), a portable media player (equivalent to a video iPod), and an Internet client (with e-mail, web browsing, and Wi-Fi connectivity). The user interface is built around the device's multi-touch screen, including a virtual keyboard rather than a physical one. Third-party applications are available from the App Store, which launched in mid-2008 and now has well over 200,000 apps approved by Apple. These apps have diverse functionalities, including games, reference, GPS navigation, social networking, and advertising for television shows, films, and celebrities. Source:
Apollonius by Adolfo Rodriguez is an Interactive Geometry Software (IGS, or Dynamic Geometry Environment, DGE) for the iPhone and iPod Touch. It allows you to make geometric constructions (such as those made using a compass and straightedge/ruler) and move their parts smoothly using the device's touchscreen.
Apollonius was inspired by similar software for personal computers, such as Cabri and The Geometer's Sketchpad. Source: