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QveST [7]
3 years ago
6

Find the exact area of ABC

Mathematics
1 answer:
Gala2k [10]3 years ago
8 0

Answer:

A = 18\sqrt{3} sq meters

Step-by-step explanation:

find BD, can use altitute rule:

3 / BD = BD / 9

BD² = 27

BD = \sqrt{27} = 3\sqrt{3}

Area of ΔABC = 1/2 · (3+9) · 3\sqrt{3}

A = 6 · 3\sqrt{3}

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