Question

Can someone give me the answers? thanks:))

Answer 1

X / 20 = 12/16

x / 20 = 3/4

4x = 60

x = 15

b. x/20 = 6/8

x/20 = 3/4  

as above x = 15

c.
They are the same because the ratios of all corresponding size of ssimilar triangles are the same.