In [b][url=https://www.geogebra.org/m/gn9zxahw]Tutorial 1[/url],[/b] we learned to draw the figure below using the Point, Line Segment, and Midpoint tools. In this tutorial, we will use the [b]Angle[/b], [b]Slope[/b], and [b]Distance or Length [/b]tools to verify your conjecture that [i]EFGH[/i] is a parallelogram. Try them yourself first and if you have difficulties, read the Notes below.

[list][*]To use the [b]Angle[/b] tool, click on it and then click three points or two line segments. [/*][*]To use the [b]Slope[/b] tool, click on it and then click on a line segment. [/*][*]To use the [b]Distance[/b] tool, click on it and then click on a line segment or two points. [/*][*]You will observe that sometimes, the angles become Reflex angles when you drag the points. If you want to set the angle from 0[b]°[/b] to 180[b]°[/b], click on the Style bar (icon on the top right), then select the Angle symbol, and the choose 0[b]°[/b] to 180[b]°.[/b] [/*][*]You can also use the Style bar to change the properties of objects such as color and size. [/*][/list]

[list=1][*]How did the tools above help you in verifying your conjecture that EFGH is a parallelogram? [/*][*]Challenge: Prove your conjecture![/*][/list]