Find the surface area of the figure.

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Presentation transcript:

Find the surface area of the figure. Problem of the Day

Section 12-3b Surface Areas of Cones

Then Now Objectives You found the lateral areas and surface areas of pyramids. Find lateral areas and surface areas of cones.

Common Core State Standards Content Standards G.MG.1 – Use geometric shapes, their measures, and their properties to describe objects. Mathematical Practices 1) Make sense of problems and persevere in solving them. 6) Attend to precision. Common Core State Standards

Cone

A waffle cone is 5 1 2 inches tall and the diameter of the base is 2 1 2 inches. Find the lateral area of the cone. Round to the nearest tenth. Example 4

A sugar cone is 8 inches tall and the diameter of the base is 2 1 4 inches. Find the lateral area of the cone. Round to the nearest tenth. Example 4

Find the surface area of each cone. Round to the nearest tenth. Example 5

Find the surface area of each cone. Round to the nearest tenth. Example 5

p.859 #4 – 6, 14 – 18, 33 Homework