Be a geometer with Dr. Geo: construct and manipulate interactive geometric models. Learn geometry, mathematics (and physics, too!) visually and interactively.
- Construct quadrilaterals and explore the properties of the parallelogram, rectangle, rhombus or square.- Draw a triangle and its circumscribing circle, then drag one of its corners slowly to cross the opposite side. Visually observe why a straight line is an "infinite circle". Get junior high school kids motivated with the idea of "crosscap" in projective geometry and topology.- Learn about the symmetry you can find in car logos.- Understand why the measures of the interior angles of a triangle always add up to 180 degrees.- Visualize the properties of the rectangle, isosceles or equilateral triangles.- Understand how a Newtonian telescope works and play with its model.- Play with the Trammel of Archimedes to draw ellipse.- Draw an ellipse, then drag one of its focii, and watch how it gradually becomes a hyperbola.- Move the focus of a lens in a Dr. Geo sketch, and learn how a real inverted image morphs into a virtual upright image. Use the macro function to stack two lens and create your microscope in Dr. Geo.- Discover how Eratosthenes calculated the circumference of the Earth.
Plus many more to explore or to create yourself.
All in all Dr. Geo is an interactive geometry application. It allows one tocreate a dynamic geometric model you can manipulate according to itsconstraints. It is usable at home or at school, in primary orsecondary education level. With the free Desktop version, you can alsoconstruct very elaborated sketches to share with your friends,students or kids on tablet.
With Dr. Geo you construct: - free point, mobile point on a curve, intersection point, point atthe middle of two points, or segment middle.- line, parallel line, perpendicular line, perpendicular bisector,angle bisector, ray, segment, vector, circle, arc, polygon, locus.- geometric transformation: symmetry, reflection, translation,homothety (scale).- distance between objects, length, coordinates, equations, free text.- macro-construction: teach Dr. Geo how to construct complex objectsfor you.
When constructing an object, Dr. Geo deduces from your constructionsequence the exact nature of the object you want to construct.
For example, to construct a circle, you can:1. select two points then Dr. Geo constructs a circle defined by itscenter and a point it goes through.2. select one point and a segment then Dr. Geo constructs a circledefined by its center and a radius equal to the segment's length.3. select one point and a value then Dr. Geo constructs a circledefined by its center and a radius equal to the value.
When necessary, Dr. Geo constructs for you, on the fly, intermediatepoint(s): free on the sketch, mobile on a curve or at the intersection oftwo curves.
VERSION HISTORY
- Version 13.10 posted on 2013-09-25
New features,Attach a value,Opaque polygon,Input text in a dialog,Text formatted in several lines,Bugs fixes,Tap and not click,Label uneasy to select and move,Slow when creating numerous items,Moving in gridded mode without the grid,Text formatted in several lines - Version 13.06 posted on 2013-06-25
Several fixes and updates
Program Details
- Category: Education > Teaching & Training Tools
- Publisher: iStoa
- License: Free Trial
- Price: $4.80
- Version: 13.10
- Platform: android