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area_trapezoid =½ × sum_parallel_sides × perpendicular_height_between_them

→ height = 2 × area_trapezoid ÷ sum_parallel_sides

10 mm = 1 cm

→ height = 2 × 22.1778 cm² ÷ (66.6 ÷ 10 cm) = 6.66 cm

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10y ago

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