Rabc=po*(a+b)/S
Radc=Rabc
Rabcd=po*(a+b)/(2*S) AC=√(a²+b²)
Ro=Rabcd*Rac/(Rabcd+Rac)
Ro=po*(a+b)*√(a²+b²)/(S*(a+b+2*√(a²+b²))
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Verified answer
Rabc=po*(a+b)/S
Radc=Rabc
Rabcd=po*(a+b)/(2*S) AC=√(a²+b²)
Ro=Rabcd*Rac/(Rabcd+Rac)
Ro=po*(a+b)*√(a²+b²)/(S*(a+b+2*√(a²+b²))
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