5. An isosceles triangle has perimeter 30 cm and each of the equal sides is 12 cm. Find
the area of the triangle.
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First,let the third side be x.
It is given that the length of the equal sides us 12 cm and it's perimeter is 30 cm.
So,
So,the length of the third side is 6 cm.
Thus,the semi perimeter of the isosceles triangle (s) = 30/2 cm =15 cm
By using Heron's Formula,
Area of the triangle,
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