Area of an isosceles triangle

If the area os an isosceles triangle is sqrt2 + 1 and vertical angle is 45^(@) then the base of the triangle is

The area of the isosceles triangle is (5)/(4)sqrt11cm^(2) if the perimeter is 11 cm and the base is 5 cm.

The area of the isosceles triangle is 5/4 sqrt11 cm^2 , if the sperimeter is 11 cm and the base is 5 cm.

Find the area of the isosceles triangle with base 16 cm and vertical angle 60^(@)40'

The ratio of the area of two isosceles triangles having the same vertical angle (i.e. angle between equal sides) is 1:4. The ratio of their heights is

Write True or False and justify your answer: The area of the isosceles triangle is (5)/(4)sqrt11 cm^(2) if the perimeter is 11 cm and the base is 5 cm .

Find the area and perimeter of an isosceles triangle whose equal sides are 5 cm each and base is 6 cm .

Find the area of isosceles triangle whose equal sides are of length 15 cm each & the third side is 12cm.

Find the area of isosceles triangle whose non equal side are of 12cm having the corresponding altitude 7.5 cm.