The perimeter of an isosceles triangle is 20.6 dm. if: a) the base is 6 dm, then find its side side

The perimeter of an isosceles triangle is 20.6 dm. if: a) the base is 6 dm, then find its side side b) the base is 2.6 dm larger than the side side, then find its sides.

a = (P – c): 2 = (20.6 – 6): 2 = 7.3 (dm);

b). c = a + 2.6; P = 2 * a + a + 2.6 = 3 a + 2.6;

a = (P – 2.6): 3 = (20.6 – 2.6): 3 = 6 (dm); c = 6 + 2.6 = 8.6 (dm);