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panjang kl=8(pakai phytagoras)
luas segitiga=1/2×8×6=24 cm²
luas segitiga=1/2×kn×10=24 cm²
10 kn=48 cm²
kn=4,8 cm/C
24.3x-2+2x+2=180
5x=180
x=36 sedut pelurus ABD=2×36+2=74°/A
kasih mahkota ya^_^