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Berrysaleen
Measure where X is with a ruler and put it in cm or inches
caylus
Hello,

As your title shows it, using Pythagorean's theorem:

x²+8²=10²
==> x²=100-64
==> x²=36
==> (x-6)(x+6)=0
==>x=6 or x=-6

x=6 since x must  be >0