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Easy

Question

# An isosceles triangle has perimeter 30 cm and each of the equal sides is 12 cm. Find the area of triangle.

Hint:

### Use the formula ,

## The correct answer is: 34.86 cm2

### Let length of the third side = b

It is given that perimeter of triangle = 30 cm

12 + 12 + x = 30

x = 30 – 24 = 6 cm

Area of an isosceles triangle = where a is length of equal side and b is third side

So, a = 12 and b = 6 cm

Area of an isosceles triangle =

=

= 34.86 cm^{2}

^{2}

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