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Byju's Answer
Standard IX
Mathematics
Triangle Inequality 2
If the minimu...
Question
If the minimum distance from its opposite side of an equilateral triangle is
4
√
3
cm, then determine the side length of the triangle.
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Solution
Length of the perpendicular drawn from vertex A is the minimum distance of vertex A from its opposite side.
Let's assume the side length of the triangle be
′
a
′
.
The perpendular drawn divides the opposite side in two equal parts. Therefore, the length of side, BD =
a
2
cm
Using Pythgorus theorem in triangle ABD;
A
D
2
+
B
D
2
=
A
B
2
(
4
√
3
)
2
+
(
a
2
)
2
=
a
2
48
+
a
2
4
=
a
2
48
=
a
2
−
a
2
4
48
=
3
a
2
4
64
=
a
2
a
=
8
c
m
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