Find the Area of the Shaded Region in the Figure $80 \mathrm {~mm} ^ { 2 }$

Multiple Choice

Find the area of the shaded region in the figure. Round results to the nearest unit. Use π≈ 3.14.
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A) $80 \mathrm {~mm} ^ { 2 }$
B) $99 \mathrm {~mm} ^ { 2 }$
C) $134 \mathrm {~mm} ^ { 2 }$
D) $49 \mathrm {~mm} ^ { 2 }$