# Open Middle: Building Isosceles Trapezoids

- Author:
- Tim Brzezinski

- Topic:
- Coordinates, Geometry, Isosceles Triangles, Trapezoid

The quadrilateral below has 4 vertices.
Each vertex has 2 coordinates (

*x*,*y*).**Your task:**Construct a quadrilateral in the app below so that- Coordinates take on integer values 0 - 9
- There are
*no repeated coordinates* - The quadrilateral formed is an
*isosceles***trapezoid**

**Note:**Repeated coordinates, if any, are displayed to the right.## Create an isosceles trapezoid below. Be sure the vertices have no repeated coordinates!

Use any GeoGebra tool(s) in the app above to clearly show how you know the quadrilateral you just formed is an isosceles trapezoid. Be sure to fully explain your reasoning!

## Create another isosceles trapezoid different from the one you created above. Be sure the vertices have no repeated coordinates!

Use any GeoGebra tool(s) in the app above to clearly show how you know the quadrilateral you just formed is an isosceles trapezoid. Be sure to fully explain your reasoning!