1. Open your sketchpad document.

2. Select the Selection Arrow Tool.


Click anywhere on the document to make sure everything is deselected and continue deselecting after making a calculation.

3. Select the base segment.
> Measure
>Length

4. Select the height segment.
> Measure
>Length

5. Select the Yellow Triangle.
> Measure
>Area

Your calculations will not be the same as the above screen shot.