Answer:
Area = 194.4
Step-by-step explanation:
This is an example of Heron's Formula
Givens
a = 17.1
b = 22.8
c = 28.5
s = semi perimeter.
Formula
Area = sqrt(s * (s- a) * (s - b) * (s- c))
s
s = (a + b + c)/2
s = 34.2
Solution
s = 34.2
s - a = 17
s - b = 11.4
s - c = 5.7
Area = sqrt(34.2 * 17 * 11.4 * 5.7)
Area = sqrt(37779.372)
Area = 194.4
