Answer:
D
Step-by-step explanation:
You can see that the ratio between the little triangles base and the big triangles base is 20:36(1:1.8) so it would be the same for all sides of the traingle, so if we divide 1.8 from 45 we will get the little side of the triangle but since there is a 5x we need to divide 25 by 5 and we get 5:
