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Marat540 [252]
2 years ago
9

Given: △AFD, m∠F=90° DF=7√3 , m∠D=30° Find: Area of △AFD

Mathematics
1 answer:
Aliun [14]2 years ago
4 0

Using the definition of the tangent function, you can find ...

... FA = DF·tan(30°) = (7√3)·(1/√3) = 7

Then the usual formula for triangle area can be used:

... Area = (1/2)bh = (1/2)·(7√3)(7)

... Area = (49/2)√3 square units

... ≈ 42.44 square units

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