These objects are trianglular windows. I decided to choose the pairs of triangles as one big triangle, not the individual triangles. Triangles are goemetric shapes. The triangles I've chosen are congruent. Because of the angle that the picture was taken, the triangles do not look congruent, but they are. The two bottom angles of one of triangles are congruent, and the second triangle's angles are also congruent to each other, and are also congruent to the angles in the other triangle. The opposite sides of each of the angles are congruent to each other, and are also congruent to the same sides of the other triangle.
These windows were found at Liberty Ski Resort in Pennsylvania. Some examples of how windows are used are to let sunlight inside buildings or rooms, letting fresh air go from outside into a building or room, and getting things from one place to another.
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