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GeoGebra
Introduction to Geometry
Planes and Lines
Angles
Parallel Lines
Triangles
Constructions
Introduction to Geometry
Author:
Curt Painter
,
GreenMaths
,
pchou
Topic:
Geometry
Simple applets useful for introducing Geometry to first year students.
Table of Contents
Planes and Lines
Planes, lines etc
Planes, lines etc completed
Angles
Angles as rotations
Straight angles and full circle angles.
Angle Size and Arm Length
Measuring with a protractor
Vertically Opposite Angles 2
To Show That Vertically Opposite Angles Are Equal
Parallel Lines
Showing Alternate Angles
Showing Corresponding Angles
Showing the Sum of Interior Angles
Parallel Lines and Alternate and Corresponding Angles
Non-Parallel Lines and Alternate and Corresponding Angles
More Exercises with Parallel Lines
Triangles
The sum of the angles in a triangle?
Sum of the angles in a triangle
Triangle Exterior Angle Sum Theorem
Isosceles Triangles
Constructions
Construction - Divide a line segment into equal parts
Related Topics
Angles
Congruence
Conic Sections
Constructions
Coordinates
Discover Resources
bbb[2]
Hyperbolas (rectangular) explorations
angles in a triangle (matching 2)
Sampling Methods
[洋葱] 2018山东淄博23：中点相关
Discover Topics
Hypergeometric Distribution
Conic Sections
Circle
Prism
Ratios
