What is the square root of 64?

Go 16 units of distance in any direction. Turn 90 degrees clockwise and go 16 units of distance in a straight line. Turn 90 degrees clockwise and go 16 units of distance in a straight line. Turn 90 degrees clockwise and go 16 units of distance in a straight line.

You will have travelled along a square route whose total distance is 64 units. Alternatively you could have turned counter clockwise each time.

The square roots of 64 are -8 and 8.

They are -8 and +8.

The square roots of 64 are ±8.