H.5

Surface Area of Cones

Q4 · Apr–Jun

Add the base circle and the curved side, πr² + πrℓ, using the slant height (π ≈ 3.14).

Level

Medium

Level

Problems

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@page { size: letter; margin: 0; } @media print { .ws-page + .ws-page { break-before: page; } } Daniel Math Academy \cdot Grade 8 Math Surface Area of Cones Skill H.5 \cdot Volume & surface area \cdot ★★☆ Medium \cdot Quarter 4 Name Date Score / 6 Scan for answers Use π \approx 3.14. Include square units. Example r = 3 cm 5 cm Surface area = 75.36 cm² Think: The base circle, 3.14 \times 3^{2} = 28.26, plus the curved side, 3.14 \times 3 \times 5 = 47.1 : 75.36 in all. 1 r = 6 ft 10 ft Find the surface area. 2 d = 6 cm 4 cm Find the surface area. 3 d = 16 in 14 in Find the surface area. 4 r = 4 m 10 m Find the surface area. 5 d = 8 in 5 in Find the surface area. 6 r = 5 cm 15 cm Find the surface area. Daniel Math Academy \cdot danielmath.com Worksheet # 5ubvkni \cdot Page 1 / 2 Daniel Math Academy \cdot Grade 8 Math Answer Key H.5 Surface Area of Cones \cdot ★★☆ Medium 1 301.44 ft² 2 65.94 cm² 3 552.64 in² 4 175.84 m² 5 113.04 in² 6 314 cm² Daniel Math Academy \cdot danielmath.com Worksheet # 5ubvkni \cdot Answer Key \cdot Page 2 / 2

H. Volume & surface area6 skills