12. Find the area of the equilateral triangle whose
each side is (i) 12 cm (ii) 5 cm.
13. The perimeter of an equilateral triangle is 24 cm.
Find its area.
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ANSWER
An equilateral triangle has its sides equal.
Perimeter of an equilateral triangle=3a where a is length of the side
Given 75=3a
⇒3a=75
⇒a=375=25cm
∴ Side of the equilateral triangle=25cm
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