Mathematics, 26.11.2020 02:10, kitttimothy55

She started by finding the surface area of the triangle and did 1612 to get 192. Then she multiplied that by 2 and got 384. Next she found the areas of the rectangles by doing 1020 = 200, 1210 = 120, and 1610 = 160.

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

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