Page 54 - Math Course 3 (Book 2)
P. 54
Geometric Surface Area: Cones
Your Turn!
Lateral Area of a Cone
A hat for a child’s birthday party has a conical shape with an altitude of 9 inches and a diameter of 5 inches.
Find the lateral area of the birthday hat. Round to the nearest tenth.
A. 73.4 in²
B. 70.7 in²
C. 141.4 in² 9 in.
D. 146.7 in²
Answer
5 in.
Surface Area of the Cone
Find the surface area of the cone. Round to the nearest tenth.
A. 124.6 cm²
B. 80.2 cm²
C. 63.6 cm² 6.5 cm
D. 20.2 cm²
Answer
2.3 cm
Skill Practice!
Find the surface area of each cone. Round to the nearest tenth if necessary.
1. 2.
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