An Isosceles triangle has 2 sides of equal length . The base angles of an isosceles triangles are equal. The total angle of a triangle is equals to 180 degree's. The third angle can be found below
[tex]180^{\circ}-2(65^{\circ})[/tex]Note each of the base angle is 65 degrees. Th sum of the 2 base angles will be 2(65) = 130 degree's.