Penjelasan dengan langkah-langkah:
a. Tentukan panjang sisi yang lain
k = s1 + s2 + s3
36 = 12 + 9 + s3
36 = 21 + s3
s3 = 36 - 21
s3 = 15 cm
__
L = 1/2 × a × t
L = 1/2 × 9 × 12
L = 9 × 6
L = 54 cm²
Jawab:(a.) = 15 cm(b.) = 54 cm²
Diketahui Δ⊥Keliling (k) = 36 cmtinggi (a) = 12 cmalas (b) = 9 cm
(a.) cari cc = k - a - bc = 36-12-9c = 15 cm
(b.) LuasLuas = ab/2Luas = 12(9)/2Luas = 6(9)Luas = 54 cm²
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Penjelasan dengan langkah-langkah:
a. Tentukan panjang sisi yang lain
k = s1 + s2 + s3
36 = 12 + 9 + s3
36 = 21 + s3
s3 = 36 - 21
s3 = 15 cm
__
L = 1/2 × a × t
L = 1/2 × 9 × 12
L = 9 × 6
L = 54 cm²
Jawab:
(a.) = 15 cm
(b.) = 54 cm²
Penjelasan dengan langkah-langkah:
Diketahui Δ⊥
Keliling (k) = 36 cm
tinggi (a) = 12 cm
alas (b) = 9 cm
(a.) cari c
c = k - a - b
c = 36-12-9
c = 15 cm
(b.) Luas
Luas = ab/2
Luas = 12(9)/2
Luas = 6(9)
Luas = 54 cm²
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