Answer:
294 m² is correct
Explanation:
The area (A) of a trapezoid is calculated using the formula
A = h (a + b)
where h is the height and a, b the parallel bases
here h = 21, a = 21 and b = 7, thus
A = × 21 × 28 = 294 m²
im ppretty sure thats correct. Im not a genius though.
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h (a + b) × 21 × 28 = 294 m²