Hello!
Answer:
[tex]\boxed{ \bf The~area~of~the~shaded~region~is~B.~24 mm^2}[/tex]
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Explanation:
To find the area of the shaded region, we must find the area of the inner white triangle and subtract it from the area of the outer blue one.
Outer:
A = [tex]\frac{1}{2}[/tex]bh
A = [tex]\frac{1}{2}[/tex](12 · 5)
A = [tex]\frac{1}{2}[/tex](60)
A = 30 mm²
Inner:
A = [tex]\frac{1}{2}[/tex]bh
A = [tex]\frac{1}{2}[/tex](4 · 3)
A = [tex]\frac{1}{2}[/tex](12)
A = 6
30 - 6 = 24
