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ABCDEF is a regular hexagon of side 12 cm What is...

This question belongs to Arithmetic Ability Mensuration 2D
Mensuration 2D
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ABCDEF is a regular hexagon of side 12 cm. What is the area (in cm2) of the triangle ECD?

Answer & Solution
Correct Answer: Option C
Mensuration 2D mcq question image
$$\eqalign{ & {\text{ar }}\Delta EDC = \frac{1}{2} \times ED \times DC \times \sin \angle EDC \cr & = \frac{1}{2} \times 12 \times 12 \times \sin {120^ \circ } \cr & = 36\sqrt 3 {\text{ c}}{{\text{m}}^2} \cr} $$
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