Isosceles Triangle: Quick Construction
Directions:
In the app below,
- Construct a circle using the CIRCLE tool
. - Use the POINT ON OBJECT tool
to plot 2 additional points that lie on this circle. - Use the POLYGON tool
to construct a polygon whose vertices are the circle's center and the two points you just constructed in step (2) above.
Keep going: More directions appear below this app.
4. Select the MOVE tool 
now and move the vertices of this triangle around.
How would you classify this triangle by its sides?
Why would you classify it this way?
5. Select the ANGLE 
tool to find and display the measures of all 3 angles of this triangle.
What do you notice? (Be sure to select the MOVE 
tool again so you can keep dragging the triangle's vertices around.)