An isosceles triangle has perimeter 30 cm and each of the equal sides is 12 cm. Find the area of the triangle.
Solution:
Length of first side of triangle
cm
Length of second side of triangle
cm
Perimeter of triangle
cm
Length of third side of triangle =c=Perimeter of triangle-a-b
cm
Semi-perimeter of triangle
cm
Using Heron’s formula to find area of triangle, we get
Area of triangle
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