please help me i need to finish quickly

Answer:
g = 1
Step-by-step explanation:
Here we have used the property of "similar figures" which states that if two figures are similar then their corresponding sides are proportional and their angles are same.
Therefore,
[tex] \sf \longrightarrow \: \frac{6}{2} = \frac{3}{g} \: \: \: \: \: \: \: \: \\ \sf \longrightarrow \: 6g = 3 \times 2 \\ \sf \longrightarrow \: g = \frac{6}{6} = 1 \: [/tex]
Hope it helps you mate :)