Take into account that the area of a triangle is given by the following formula:
[tex]A=\frac{bh}{2}[/tex]
where,
b: length of the base = ?
h: height = 2/5 cm
Solve the expression above for b, replace the values of A and h, and then simplify:
[tex]\begin{gathered} b=\frac{2A}{h} \\ b=\frac{2(\frac{2}{15}cm^2)}{\frac{2}{5}cm}=\frac{2}{3}cm \end{gathered}[/tex]
Hence, the length of the base is 2/3cm
