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  1. If the perimeter of an equilateral triangle be 18 cm, then the length of each median is
    1. 3√2 cm
    2. 2√3 cm
    3. 3√3 cm
    4. 2√2 cm
Correct Option: C

Perimeter of equilateral triangle = 3 × side
∴ 3 × side = 18

⇒ Side =
18
 = 6 cm.
3

∴ Length of median =
√3
 × side
2

=
√3
 × 6 = 3√3 cm
2


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