यदि किसी त्रिभुज की दो भुजाएं क्रमशः 9 सेंटीमीटर तथा 10 सेंटीमीटर है और जिसकी परिमिति 27 सेंटीमीटर है तो त्रिभुज का क्षेत्रफल है
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Answer:
Length of third side=27-(9+10) =8
You have to use Heron formula
A=sq root of {s (s-a)(s-b)(s-c)}
s=27/2=13.5
A= sq root {13.5×4.5×3.5×5.5}
=34.2
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