Calculating FB.
a = 8+9
a = 17 units.
b = 9-8
b = 1 unit.
c² = 17²+1²
c = √(290) units.
c = 17.0293863659 units.
c is DE.
2d² = c²
2d² = √(290)²
d² = 145
d = √(145) units.
d = 12.0415945788 units.
d is the radius of the ascribed half circle.
Calculating Length FB.
Let it be e.
e²+1² = d²
e² = √(145)²-1²
e² = 145-1
e² = 144
e = See √(144) units.
e = 12 units.
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