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Mathematics, 26.11.2020 02:10 kitttimothy55

She started by finding the surface area of the triangle and did 16*12 to get 192. Then she multiplied that by 2 and got 384. Next she found the areas of the rectangles by doing 10*20 = 200, 12*10 = 120, and 16*10 = 160.

Finally, she added all the area together and got 672cm squared.
Where did Kendra make her mistake?

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