CBSE 2023 · Region 2 · Set 1 · Q14 · 1 mark
If (a, b), (c, d) and (e, f) are the vertices of $\displaystyle \triangle \mathrm{ABC}$ and $\displaystyle \Delta$ denotes the area of $\displaystyle \triangle \mathrm{ABC}$, then $\displaystyle \left|\begin{array}{lll}\mathrm{a} & \mathrm{c} & \mathrm{e} \\ \mathrm{b} & \mathrm{d} & \mathrm{f} \\ 1 & 1 & 1\end{array}\right|^{2}$ is equal to
Official answer
From CBSE’s own marking scheme for this paper.
(B)
$\displaystyle 4 \Delta^{2}$
DeterminantsArea of a TriangleUnderstandmcqmedium
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CBSE Class 12 Mathematics past-paper question from the 2023board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.