CBSE Class 9 Answered
Find the area of a triangle with perimeter 22 cm, one side 9 cm and difference of other two sides is 7 cm.
Asked by Topperlearning User | 21 Aug, 2017, 08:49: AM
Expert Answer
Let a = 9
Now, a + b + c = 22
b + c = 22 - 9 = 13
b + c = 13 …(1)
Also, b - c = 7(given)… (2)
Adding (1) and (2) we get
2b = 20
Or, b = 10
From (1), c = 13 - 10 = 3.
Hence, a = 9, b = 10, c = 3 and s = 11
Answered by | 21 Aug, 2017, 10:49: AM
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