Question

Find the exact area of ABC

Answer 1

A = 18
`√(3)` sq meters

Explanation:

find BD, can use altitute rule:

3 / BD = BD / 9

BD² = 27

BD =
`√(27)` = 3
`√(3)`

Area of ΔABC = 1/2 · (3+9) · 3
`√(3)`

A = 6 · 3
`√(3)`