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2016 cm²=jss×36÷2
jss=2016÷36×2
jss=112 cm
2. Luas=1/2×50×41=1.025 cm²
3. JSS=4,5+7,5=12 cm
Luas=JSS × t ÷ 2
120cm²=12×t÷2
Tinggi=120÷12×2
Tinggi=20 cm
4. Luas=1/2×d1×d2
171 cm²=1/2×19×d2
d2=171×2÷19
d2=18 cm
5. Luas=1/2×15×12
Luas=90 cm²