A triangular plot $ABC$ has $AB=42$ m, $AC=55$ m and $\angle BAC=72^\circ$. Calculate $BC$

Question

A triangular plot $ABC$ has $AB=42$ m, $AC=55$ m and $\angle BAC=72^\circ$. Calculate $BC$. Calculate the area of the plot, giving each answer correct to 3 significant figures.

Accepted Answer

(a) $57.977$ m; (b) $1098.47\,\text{m}^2$.

Sec 3/4 E Math T07-Q20 - Surveying a triangular plot of land

Sec 3/4 E Math T07-Q20 - Surveying a triangular plot of land

Solution:

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