costruct a ∆ABC, in which =B 90o , BC = 3 cm and AB + AC = 9 cm.
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Step-by-step explanation:
ab=4cm and bc=3cm
So, by Pythagoras theorem ac
2
=ab
2
+bc
2
=4
2
+3
2
=16+9=25
ac=
2
5=5
Radius of circle =
Semiperimeter
Areaoftriangle
23+4+5
21 ×3×4
2=12
6=1
Radius =1cm
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