Answer:
a. x = 9
b. x = 3.6
Step-by-step explanation:
a. By Basic proportionality theorem:
AB/BD = AC/CE
4/4 = x/9
1 = x/9
9 = x
x = 9
b.
[tex] In \: \triangle ABC \: \& \: \triangle EDF\\
\angle B \cong \angle D....(given) \\
\angle C \cong \angle F.....(given) \\
\therefore \triangle ABC \: \sim \: \triangle EDF.. (AA\: POSTULATE) \\
\therefore \frac{AB}{ED} = \frac{BC}{DF} ...(csst) \\
\therefore \frac{2}{5} = \frac{x}{9}\\
\therefore x = \frac{2\times 9}{5} \\
\therefore x = \frac{18}{5} \\
\huge \red{\boxed {\therefore x = 3.6}} \\[/tex]
