Jawaban terlampir
Penjelasan dengan langkah-langkah:
# maaf kalo salah
# semoga bermanfaat
# kalau salah report jangan marah-marah karna salah ya ˚‧º·(˚ ˃̣̣̥⌓˂̣̣̥ )‧º·˚
No 4.
Jari² lingkaran luar ∆
Dik
Dit
Jawab
S = 1/2(a+b+c) = 1/2(10+12+18)
= 1/2 (40) = 20
L∆ = √s(s-a) (s-b) (s-c)
L∆ = √20(20-10) (20-12) (20-18)
L∆ = √20 . 10 . 8 . 2 = √1.600 . 2 = 40√2 cm²
r = a . b . c = 10 . 12 . 18 = 27 × √2
4L 4 . 40√2 2√2 √2
= 27 √2 = 27 √2 cm
4 4
Jawaban Opsi C.
" Life is not a problem to be solved but a reality to be experienced! "
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Jawaban terlampir
Penjelasan dengan langkah-langkah:
# maaf kalo salah
# semoga bermanfaat
# kalau salah report jangan marah-marah karna salah ya ˚‧º·(˚ ˃̣̣̥⌓˂̣̣̥ )‧º·˚
No 4.
Jari² lingkaran luar ∆
Dik
Dit
Jawab
S = 1/2(a+b+c) = 1/2(10+12+18)
= 1/2 (40) = 20
L∆ = √s(s-a) (s-b) (s-c)
L∆ = √20(20-10) (20-12) (20-18)
L∆ = √20 . 10 . 8 . 2 = √1.600 . 2 = 40√2 cm²
r = a . b . c = 10 . 12 . 18 = 27 × √2
4L 4 . 40√2 2√2 √2
= 27 √2 = 27 √2 cm
4 4
Jawaban Opsi C.