since the lengths of all those four sides are in a 3:2:6:7 ratio, and the whole perimeter is 126, what we do is, simply divide the whole by (3+2+6+7) and distribute accordingly.
The third statement is correct. <span> All
isosceles triangles are not similar. The pair of congruent angles
within one triangle is not necessarily congruent to the pair of
congruent angles within the other triangle.
