Exploring Isosceles Triangles (Version A)
In the GeoGebra Geometry app window below:
1) Use the CIRCLE WITH CENTER THROUGH POINT tool to construct a circle with center A that
passes through B.
2) Select the POINT ON OBJECT tool. With this tool selected, touch the circle in 2 different spots
to plot two different points, C and D, on the circle itself.
3) Use the POLYGON tool to construct the triangle ACD.
How would you classify this triangle by its sides? Why is this?
Keep going: More directions appear below this applet.
4) Select the MOVE tool.
5) Use the ANGLE tool to find and display the measures of all 3 angles of this triangle.
6)
What do you notice? (Be sure to select the MOVE tool again and move all 4 points around!)