Area Problem
- Author:
- Angelina S T Lam
- Topic:
- Area
A concert hall ABC which is in a triangular shape. The hall is located by a straight road DEF, where DE = 40 m and EF = 60 m. The length of the paths AD, BE and CF are 50 m, 30 m and 80 m respectively. Find the area of the concert hall ABC.