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1 answer:
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Answer:
Option (3) will be the answer.
Step-by-step explanation:
Area of a triangle =
=
Since, m∠A + m∠B + m∠C = 180°
60° + 60° + m∠C = 180°
m∠C = 180° - 120°
m∠C = 60°
Therefore, ΔABC is an equilateral triangle.
AB ≅ BC ≅ AC ≅12
Sin 60° =
CD = 6√3
Now area of ΔABC =
=
= 62.35
≈ 62.4 square units
Therefore, Option (3) will be the answer.