Answer: Area = 3.8 cm^2
Step-by-step explanation:
We would apply the heron's formula which is expressed as
Area = √s(s - a)(s - b)(s - c)
where
a,b and c are the lengths of each side of the triangle
s = (a + b + c)/3
From the information given,
a=18.6cm
b=17.2cm
c=15.0cm
Thus,
s = (18.6 + 17.2 + 15)/3 = 16.93
Thus,
Area = √16.93(16.93 - 18.6)(16.93 - 17.2)(16.93 - 15)
Area = √16.93(- 1.67)(- 0.27)(1.93)
Area = √14.733
Area = 3.8 cm^2