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P. BC= 13 cm
P. AC= ?
K. segitiga ABC= ?
AC²= BC² - AB²
= 13² - 5²
= 169 - 25
= 144
AC= √144
= 12
Jadi, paanjang AC adalah 12 cm.
Maka, kelilingnya adalah:
K. segitiga:
P. AB + P. BC + P. AC
5 + 13 + 12
18 +12
30
Jadi, K. segtiga adalah 30 cm.
BC = 13 cm
AC = ? cm
AC = √13² - 5² = √169 - 25 = √144 = 12 cm
Maka;
K = AB + BC + AC
K = 5 cm + 13 cm + 12 cm
K = 30 cm