3.For a /_ABC.If a-b+c=5cm b-c+a=7cm and c-a+b=8cm then find s.
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Answer:
s = 10cm
Step-by-step explanation:
a-b+c = 5
a+b-c = 7
-a+b+c = 8
Adding all three equations:
a + b + c = 20
s = (a+b+c)/2 = 20/2 =10
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