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12.6 Surface Areas of Cones

12.6 Surface Areas of Cones. What you’ll learn: To find lateral area of cones. To find surface area of cones. Cones. A cone is a solid with a circular base and a vertex. It has the following characteristics: The base is a circle.

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12.6 Surface Areas of Cones

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  1. 12.6 Surface Areas of Cones What you’ll learn: To find lateral area of cones. To find surface area of cones.

  2. Cones A cone is a solid with a circular base and a vertex. It has the following characteristics: • The base is a circle. • The axis is the segment with endpoints that are the vertex and the center of the circle. • The altitude is the segment from the vertex that is perpendicular to the base. Right cone – axis and altitude are the same Oblique cone – leaning over

  3. Cones Parts radius height slant height

  4. Formulas Lateral Area of a Cone where r is the radius and is the slant height. Surface Area of a Cone where r is the radius and is the slant height

  5. Find the surface area of the cone to the nearest tenth. 1.4 cm 3.2 cm

  6. A sugar cone has an altitude of 8 in. and a diameter of 2.5 in. Find the lateral area of the sugar cone.

  7. Homeworkp. 6687-24 all

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