Two congruent triangles are polygons which have the same angles, number of sides and measurement of the lengths. This means the height and the legs of the triangle has the same measurements. When the two are superimposed to each other, the answer would have to be C
D.)increased migration of people for economic opportunity
D. concert at red rocks! since from the chart it shows they are only having that in Denver. (: hope this helps!!
The Mississippi river and other western tributaries most notably the Missouri river formed pathways for western expansion.
