Practice: Tessellations of Polygons

Natalie wants to tile her bathroom floor using two colors of regular pentagonal tiles that are of identical sizes as shown in the picture. As the pentagons do not tessellate, she also needs to buy some tiles to go in the empty spaces.

The additional tile needs to fit exactly into the empty space. What would the size of the acute angle in this tile be?

What would the size of the obtuse angle in the tile be?

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