8 10 . 3 . 42 . 8 Maryam had ten pieces of paper, some of which were squares, and the rest were triangles. She cuts three squares diagonally from corner to corner. She then counted the total number of vertices of the 13 obtained pieces of paper, which came to 42 vertices. How many triangles did she have before making the cuts? A 8 (87 C6 05 E 4 06 90