Number 10 also do not write any hogwash that to a nakhalyav to receive balls and that I on you pozhaoovatsya and will take away balls from you and so I will deliver all serdech ^_^ ♡♡♡♡

241
The figure consists of the central square of 2х2 cm and 4 equilateral triangles with the party of 2 cm the area of a square of =2*2=4 cm2 the area of an equilateral triangle = to a half of a square in which there is this triangle = (2*2): 2=2 cm2 the area of all figure is =4+4*2=12 cm2 of 2 writing-book cages = 1 cm
209
Answer add