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= R² + r²
= 8² + 6²
= 64 + 36
= √100 = 10
rusuk tegak = (dibawah rusuk tegak) ² + tinggi²
= 10² + 24²
= 100 + 576
= √676 = 26
kerangka model = 2( panjang + lebar) + 4 (rusuk tegak)
= 2 ( 16 + 12 ) + 4 (26)
= 32 + 24 + 52
= 108cm²
langkah kedua mencari rusuk tegak
a = 1/2 x d1
= 1/2 x 20
= 10
PANJANGKRANGKA ADALAH
Krangka = 2 (p+l) + 4(D2)
= 2 (16 + 12) + 4(26)
= 2 (28) + 104
= 56 +104
= 160
JAWABNNYA ADALAH 160 CM