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GeoGebra
GeoGebra Classroom
Outline
Lines and Angles
Basic Geometric Objects and definitions
Types of angles
Animated acute angles
Animated view of right angles.
Animated view of obtuse angles.
Animated view of straight angles.
Animated view of reflex angles.
Protractor Practice (Not Random)
Protractor Practice (Random)
Sum of angles in polygons
Angles in a 5-pointed star
Sum of interior angles in a triangle
Sum of the angles in a triangle
Missing angle in a triangle
Definition of complementary angles
Missing complementary angle
Supplementary angles
Missing supplementary angle
Vertical angles
Triangle on a line with missing angles
Angles on a line
Broken Protractor
Lines and Angles
Author:
Duane Habecker
Topic:
Angles
,
Straight Lines
A series of applets about lines and angles for 10 to 12 year old students.
Basic Geometric Objects and definitions
Types of angles
Animated acute angles
Animated view of right angles.
Animated view of obtuse angles.
Animated view of straight angles.
Animated view of reflex angles.
Protractor Practice (Not Random)
Protractor Practice (Random)
Sum of angles in polygons
Angles in a 5-pointed star
Sum of interior angles in a triangle
Sum of the angles in a triangle
Missing angle in a triangle
Definition of complementary angles
Missing complementary angle
Supplementary angles
Missing supplementary angle
Vertical angles
Triangle on a line with missing angles
Angles on a line
Broken Protractor
Next
Basic Geometric Objects and definitions
New Resources
Ellipse as Envelope - Correspondence Method
Piano. Keyboard.
Play C3 E3 G3 C4_C4
Exploring the Area of a Triangle
Stairs (Optical Illusion)
Discover Resources
pile of points equidistant to a line
Arc Length
Dilations and Similarities
Adding Fractions
Quadratic Formula Practice Steps V2018
Discover Topics
Set Theory
Binomial Distribution
Logic
Diagrams
Integers