6 because diameter times pie =area just like radius squared times pie = area. so you simply take 36 and find the square root of it. hope this helps!
The pieces are 2.5 and 7.5 the 7.5 is the piece that is 3 times the length of the first one
It should be 4 because 1.5 * 4 will give you 6
I don’t know how to do this type stuff so sorry hope someone els can help u tho
