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C. Triangle 1 and Triangle 3

Step-by-step explanation:

For a pair of triangles to be similar, they would either need to have all equal angles or have corresponding sides in the same ratio.

The triangles below only display sides so we must look for the pair of triangles with corresponding sides in the same ratio.

We can conclude that triangle 1 and triangle 3 follow this rule since they have sides with the ratio 2:1.

why do wages differ across industries

step-by-step explanation :

micro economists are concerned with economics on an industry or individual firm basis.

macro economists are concerned with national and international level

a = 11 : 4

b = 38

c = 1 for every 6