Answer:
4:2
Step-by-step explanation:
To find the ratio of similar triangles, write a ratio between corresponding sides. Corresponding sides are sides which are matching in place and orientation between triangles. Write the ratio as [tex]\frac{big triangle}{small triangle}[/tex].
The side lengths 4 and 2 are corresponding sides. The side lengths 9 and 4.5 are corresponding sides.
The ratios are [tex]\frac{9}{4.5}[/tex] and [tex]\frac{4}{2}[/tex]. These can also be written as 4:2 and 9:4.5
