It is known that the circumference of an isosceles triangle is 30cm, and the length of one side is twice the length of the other side Length of each side
Let X be the waist
One side is twice as long as the other
When the bottom edge is 2x
X + x = 2x, no triangle
So the bottom is 1 / 2x
1/2x+2x=30
x=12,1/2x=6
So perimeter = 12 + 12 + 6 = 30
The waist length is 12cm and the bottom edge is 6cm