Answer:
50cm
Step-by-step explanation:
4x-8cm is the same as 5x-20cm
because all sides of a square are equal
so 4x-8 5x-20 are same
finding x
add 20 to both sides
4x+14
5x
take away 4x from both
x=14
one side of circle is 5x14= 70-20=50
one side = 50cm
