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]
