Thank you for the opportunity to help you with your question!

according to the given figures

those are similar triangles

so

x/y=8/12

x/y=2/3

3x=2y

y=3x/2-----(1)

area=base*height/2

3=y*x/2

from (1)

3=3x/2*x/2

1=x^2/4

x^2=4

x=2

from(1)

y=3x/2

y=3*2/2

y=3

so x=2cm

and

y=3cm

Thank you so much! I really appreciate this.

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