qiaolin112oz27u9 qiaolin112oz27u9

10-01-2018
Mathematics

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I am the number of red tiles in a design with red and blue tiles. The red tiles each have 3 sides. The blue tiles each have 5 sides. There are 3 blue tiles. There are 30 sides on the tiles in all. What number am I?

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nabihahadil nabihahadil

10-01-2018

15: the red tiles are triangle, blue tiles are pentagons

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