Intro to Geogebra
What is Geogebra?
Geogebra is an online tool that we can use to help us with Geometry.
WARMUP: Shapes in Geogebra
Here are a few different shapes made in Geogebra. Move the points that are blue around, and see what happens.
What can you do with Geogebra?
Geogebra allows us to create geometric shapes, measure them, and manipulate them.[br][br]Start by hovering over each tool in the toolbar and see what options you have available to you. [br]Then, try to follow the directions in the make lines section below.
Make lines
[list=1][*]Make a [u]line[/u] that goes through points A and B.[br][/*][*]Make a [u]segment[/u] that goes through points C and D.[/*][*]Make a [u]ray[/u] that starts at E and passes through F.[/*][/list]
Make circles.
Make a circle in three different ways.[br][list=1][*]Make a circle with a centre that goes through a point.[/*][*]Make a circle with a centre and a radius of 2.[/*][*]Make a circle that goes through three points.[/*][/list]
Measure lines
Select the Distance or Length tool.[br][br]Now click on the point A, and then B.
Measure angles
Below are points A, B and C. Find [math]\angle[/math]ABC with the Angle tool by clicking A, B then C.
Exercise: Make a self portrait
Using the various tools we've already explored (and more if you want), try to make a self portrait like the example below!