Question

Help!! Stuff about triangles

Answer 1

3

Explanation:

Since
`\angle A \cong \angle A` by the reflexive property and
`\angle ABC \cong \angle ADE` since they are both right angles,
`\triangle ABC \sim \triangle ADE` by AA.

It follows that:

`(x)/(9)=(5)/(9+6) \implies x=3`