" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Verified answer
1]a = 6 cm
b = 18 cm
c = 20 cm
Luas = 1/2.a.t
L = 1/2. 6. 18
L = 54 cm²
r = (a.b.c) / 4L
r = (6 x 18 x 20) / (4 x 54)
r = 2.160 / 216
r = 10 cm
Jari-jari lingkaran luar segitiga adalah 10 cm
2.a]
misal sisi miring = c
c² = 5² + 12²
c² = 25 + 144
c² = 169
c = √169
c = 13 cm
panjang sisi miring adalah 13 cm
2.b]
L = 1/2.a.t
L = 1/2 x 5 x 12
L = 30 cm²
2.c]
r = (a. b. c) / 4L
r = (5 x 12 x 13) / (4 x 30)
r = 780 / 120
r = 6,5 cm
jari2 lingkaran luar segitiga adalah 6,5 cm