Trig 101 45°-45°-90°
Create a 45°-45°-90° triangle below following the instructions given below:
Use the line tool and create a line from left to right by first clicking on this icon 
Select an area in the lower left of the screen, click to add point A
Move to the right and click to add point B
Select  . Right click on the point B and rename as point C
Click on the lower right of the Angle  tool to select Angle with Given Size  , click on C followed be A, click on OK
In Input bar, Type: Line[A,C'] {When you type <li> <enter> <A><,><C'> <enter>}
Select the Perpendicular tool  , click on C and the line a
Select the Move tool , click on the screen, hold the shift key and drag or select ( ) the screen,
To zoom move the scroll button with caution {It may be safer to use the zoom tools  or  beneath the .}
Type in the input bar: Intersect[b,c] {type <inter><enter> <b><,><c> <enter>}
Right click on line a and rename to a1, repeat with line b and c.
Hide a1, b1, and c1 by right click and selecting Show Object.
Also, hide C'
Type: Segment[B,C] {<seg><enter><B,C><enter>
Type: Segment[A,C]
Type: Segment[A,B]
<Ctrl><e> {opens Object Properties}
In left column select Segment , click on Basic tab, on Name drop down select Name & Value, and Close.
Scroll until the triangle fits in the screen. Move point A or point B to adjust the size to a value of 1.
You have created a 45°-45°-90° triangle. Answer the questions below, then Print the page using File | Print | Ok. in the browser menu.
A B Cron, March 1, 2011, Created with GeoGebra
Print the page using File | Print | Ok. in the browser menu. |