Question

Can you please help me out with a question

Answer 1

$\begin{gathered} \frac{10^2}{18^2}=\frac{25}{A} \\ \frac{100}{324}=\frac{25}{A} \\ 100A=8100 \\ A=\frac{8100}{100} \\ A=81mm^2 \end{gathered}$

Area of the green triangle = 81 mm squared