Answer :
The area of the triangle MNO is 97.5 square units
How to determine the area of the triangle
From the question, we have the following parameters that can be used in our computation:
The triangle
The semi-perimeter is calculated as
s = (13 + 15 + 20)/2
s = 24
The area of the triangle is then calculated as
Area = √[s * (s - a) * (s - b) * (s - c)]
So, we have
Area = √[24 * (24 - 13) * (24 - 15) * (24 - 20)]
Evaluate
Area = 97.5
Hence. the area is 97.5
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