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In accordance with WolframAlpha: "Heron's Theorem "The area (delta) of a triangle with side lengths a, b and c and semiperimeter s is given by (delta) = sqrt(s * (s-a) *(s-b) * (s-c)) ... Proof source: Heron of Alexandria. Proposition 1.8 in Metrica. Ca. 60 A.D." So Proposition 1.8 of Metrica is the well known Heron's Formula for finding the area of a triangle given its sides.
Meed velocity first. V = delta X/delta t V = 50 m/30 s = 1.666 m/s now, acceleration A = delta V/delta t A = 1.666 m/s/30 s = 0.056 m/s2 ============
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It can be and is.