35. Panjang jari jari lingkaran luar dari gambar berikut adalah.. cm

100 :v kalo gk salah #Ngasal

a = 10, b = 17, c = 21
s = 1/2 (a + b + c) = 1/2 (10 + 17 + 21) = 1/2 (48) = 24
Luas = √(s (s - a)(s - b)(s - c))
= √(24 (24 - 10)(24 - 17)(24 - 21))
= √(24 (14) (7) (3))
= √7056
= 84

Jari-jari lingkaran luar = (a.b.c)/4.Luas
= (10 . 17 . 21)/4(84)
= (3570)/(336)
= 85/8 cm
= 10 5/8 cm
= 10,625 cm