Find the area of an equilateral triangles whose perimeter is equal to 18 cm. Also find its height
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Answer:
Step-by-step explanation:
Perimeter=18 cm= 3a
So,
Side(a)=6 cm
Height^2 = 6^2 - 3^2
Thus,
Height= 5 cm
Therefore area= 1/2 *base *height
= 1/2*6*5
= 15 cm²
Hope it helps you
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