the area of the blue region is equal to :
area of the circle - area of the triangle
the area of the circle is 28.26
[tex](3 \times 3) \times 3.14 = 9 \times 3.14 \\ = 28.26[/tex]
the area of the triangle is 9.45
[tex]((1.1 + 3.4) \times 4.2) \div 2 \\ = (4.5 \times 4.2) \div 2 = 18.9 \div 2 \\ 9.45[/tex]
so the area of the blue region is
[tex]28.26 - 9.45 = 18.81[/tex]
the final answer is 18.81
good luck
