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Math Help please. 

 Sep 15, 2021
 #3
avatar+1530 
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Semiperimeter =>     s = 1/2(13+15+14)

 

Area of Δ ABC =>     A = sqrt[ s(s-13)(s-15)(s-14)]

 

Inradius =>               r = A / s

 

[AEIF] = A - (r * BC) = 28 square units

 Sep 15, 2021

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