2.
3.
If two medians of a triangle are equal, then show that the triang
Find the length of angular bisector (B) of AABC, where a = 6 cm, b = 6 cm, c = 6 cm.
Find the length of angular bisector of B. of AABC, where a = 4 cm, b = 5 cm, c = 3 cm.
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Answer:
2a
3
−54b
3
Using,a
3
−b
3
=(a−b)(a
2
+ab+b
2
)
=2(a
3
−27b
3
)
=2[(a)
3
−(3b)
3
]
=2(a−3b)[(a)
2
+(a)(3b)+(3b)
2
]
=2(a−3b)(a
2
+3ab+9b
2
)
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