panjang keliling lingkaran alas kerucut 132 cm dan garis pelukisnya 35 cm Tentukan luas permukaan kerucut
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Verified answer
Jawaban:
10164 cm²
Penjelasan dengan langkah-langkah:
L.p kerucut = πr(r+s)
= 22/7 × (7/22 x 132 cm) × (r + 35 cm)
= 22/7 × 42 cm × (42 cm + 35 cm)
= 132 cm² × 77 cm
= 10164 cm²