perhatikan gambar berikut . jika jari-jari lingkaran 13 cm dan panjang ob = 5 cm , panjang ac = ... cm. a.6 b.12 c.18 d.24

Question

Matematika Diposting : 2017-04-27 Diupdate : 2021-04-18 MIATI216

Pertanyaan

perhatikan gambar berikut . jika jari-jari lingkaran 13 cm dan panjang ob = 5 cm , panjang ac = ... cm.
a.6
b.12
c.18
d.24

Answer 1

BC^2 = OC^2 - OB^2
BC^2 = 13^2 - 5^2
BC^2 = 169 - 25
BC^2 = 144
BC^2 = 12^2
BC = 12 cm

AC = 2×BC = 2×12 = 24 cm

Answer 2

ac = √13²-5² = √169-25 = √144 = 12 cm