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= 68:4
= 17 cm
1/2.d1 = 1/2.16 = 8 cm
maka: d2 = 2.akar dr 17²-8²
= 2.akar dr 289-64
= 2.√225
= 2.15
= 30 cm
d₂ (phytagoras) :
=
=
=
=15 cm
= 15 x 2 = 30 cm