a. The length of the rectangle above is 2 units (horizontal)
The width of the rectangle above is 4 units (vertical)
b. To find the area of a rectangle you multiply the length by the width. For the given rectangle you have the next formula:
[tex]\begin{gathered} Area=Length\times Width \\ \\ Area=2units\times4units \\ \\ Area=8units^2 \end{gathered}[/tex]
c.
d. The two congruent (equal) shapes formed above are triangles.
e. The area of one triangle is the half of the area of the rectangle:
[tex]\begin{gathered} Area\text{ }triangle=\frac{Area\text{ }rectangle}{2} \\ \\ Area\text{ }triangle=\frac{Length\times Width}{2} \\ \\ Area\text{ }triangle=\frac{2units\times4units}{2} \\ \\ Area\text{ }triangle=\frac{8units^2}{2} \\ \\ Area\text{ }triangle=4units^2 \end{gathered}[/tex]
