user989 user989
  • 22-02-2021
  • Mathematics
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Find the exact area of ABC

Find the exact area of ABC class=

Respuesta :

clarch19
clarch19 clarch19
  • 22-02-2021

Answer:

A = 18[tex]\sqrt{3}[/tex] sq meters

Step-by-step explanation:

find BD, can use altitute rule:

3 / BD = BD / 9

BD² = 27

BD = [tex]\sqrt{27}[/tex] = 3[tex]\sqrt{3}[/tex]

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

A = 6 · 3[tex]\sqrt{3}[/tex]

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