Answer the 11th question. { NO LINKS }.{ NO ANSWERS FROM GOOGLE }.
Q.11. Find the area of an isosceles triangle whose equal sides are 12 cm each and the perimeter is 30 cm.
Here two equal sides of triangle =
And perimeter of triangle = 30 cm
Then third side of triangle is,
Then, semi-perimeter of triangle;
So using heron's formula we have;
And perimeter of triangle = 30 cm
Then third side of triangle is,
Then, semi-perimeter of triangle;
So using heron's formula we have;