Same y-value:
( 28, 40 )
( 8, 40 )
The x distance across is = 28 - 8 = 20
Same x-value:
( 18, 64 )
( 18, 16 )
The y distance top to bottom is = 64 - 16 = 48
20/2 = 10
48/2 = 24
c = √ (10^2 + 24^2) = √ 676 = 26
This is the length of one side, so:
26*4 = 104 is the length of tape