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Can someone help me on the surface area of this shape please

Can someone help me on the surface area of this shape please-example-1
User Digarok
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2 Answers

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The final answer is A.
User Wazaki
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Use the pythagorean theorem. Solve for the 3rd side which is 3 since a perfect triplet is 3,4,5. 4*2+3*2+1/2(4*3)=20 sq.in. The answer is A.
User Markiesch
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