If so, state how you know they are similar and complete the similarity statement.
9)
If the little red arrows in the triangles mean "parallel," then the first two triangles are similar by AA congruency
So Δ FGH is simillar ΔFBC
10) Not similar....we can see this by taking ratios of the two shortest sides....that is....
44/66 = 11/18 ???
4/6 = 11/18 ??? cross-multiply..
18 * 4 = 11 * 6 ???
72 = 66 not equal....so ....not simillar