Is it true dilations of a segment must be congruent to the original segment?

Is δ pmr similar to δ smn ? if so, which postulate or theorem proves these two triangles are similar?

Tabby sells clothing at a retail store, and she earns a commission of 6.25% on all items she sells. last week she sold a pair of jeans for $32.50, a skirt for $18.95, and 2 blouses for $14.95 each. what was tabby's total commission? a $4.15 b $5.08 c $81.35 d $348.60

If 3 3/4 lb. of candy costs 20.25 how much would 1lb. of candy cost