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ukuran sisi penyiku = 6 cm dn 8 cm
asumsi gambar : segitig siku2 (ABC) dengn siku2 di C berda dlm lingkran dengn diameter AOB
Maka :
AB² = AC² +BC²
AB² = 6² + 8²
AB² = 36 +64
AB = √100
AB = 10
jadi diameter = 10 cm
maka Jari-jari = 10/2 = 5 cm
= 24
jari-jari = ( a x b x c ) : 4luas Δ
= (10 x 8 x 6) : (4x24)
= 480 : 96
= 5
jawabnnya adalah 5 cm