Question

Help with this problem please!

Answer 1

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
$(3 \times 3) \times 3.14 = 9 \times 3.14 \\ = 28.26$

the area of the triangle is 9.45
$((1.1 + 3.4) \times 4.2) \div 2 \\ = (4.5 \times 4.2) \div 2 = 18.9 \div 2 \\ 9.45$


so the area of the blue region is
$28.26 - 9.45 = 18.81$


the final answer is 18.81



good luck