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Verified Answer :

okay do find the area of a triangle and then add it to the area of the rectangles

SA = Base Area • 2 + base perimeter • distance

SA = 1/2(12•8)+(12+10+10)•10
1/2(96)+(32•10)
48+320
SA= 368

SA = Base Area • 2 + base perimeter • distance

SA = 1/2(12•8)+(12+10+10)•10
1/2(96)+(32•10)
48+320
SA= 368

SA = Base Area • 2 + base perimeter • distance

SA = 1/2(12•8)+(12+10+10)•10
1/2(96)+(32•10)
48+320
SA= 368

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