Find the area of triangle given that a=28.3, b=31.7, c=42.8.

 Find the area of triangle given that a=7, b=7, c=9.

 Find the area of triangle given that a=32.65, b=42.81, c=64.92.

Find the area of triangle given thata=16, b=20, c=33.

Find the area of triangle given that a=4584, b=5140, c=3624.

Find the area of triangle given thata=37.34, b=3.24, c=35.06.

 Find the area of triangle given that a=524, b=276, c=315.

Find the area of triangle given that a=18, b=24, c=30.

 Find the area of triangle given that a=31.9, b=56.31, c=40.27.

 Find the area of triangle given that a=28.3, b=31.7, c=42.8.