Question 1142821
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The side lengths are a = 195; b = 157; c=210 (given).<br>
The semiperimeter is half the perimeter:  {{{s = (a+b+c)/2}}}.  Use a calculator if needed.<br>
Use Heron's formula to find the area:  {{{A = sqrt(s(s-a)(s-b)(s-c))}}}.  You will need a calculator for that.