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sisi miring = 8 cm
keliling alas kerucut = 1/4 x 22/7 x 2 x 8 = 88/7 cm
jari-jari (r) kerucut ⇒ 2πr = 88/7
r = 44/7 x 7/22 = 2 cm
tingg kerucut (t)² = 8² - 2² = 64 -4 = 60
t = √60
Volume kerecut = 1/3 πr²t = 1/3x22/7x4x√60 = (88/21)√60 cm³ = 32,5 cm³
Luas selimut kerucut = πrs = 22/7 x 2 x 8 = 50,3 cm²