10-4 Surface Areas of Pyramids

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Presentation transcript:

10-4 Surface Areas of Pyramids Objective – Find the surface area of pyramids and cones.

Pyramids Slant Height Height Pyramid Pyramid

Theorem 10-3 Lateral Area and Surface Area of a Regular Pyramid Base Perimeter Slant Height B Surface Area Lateral Area Base Area

#1 Finding Surface Area of a Pyramid Find the surface area of a square pyramid with base edges 5 m and slant height 3 m.

#2 Finding Surface Area of a Pyramid Find the surface area of a regular hexagonal pyramid with a slant height 20 in and sides 8 in.

#3 Finding Surface Area of a Pyramid Find the lateral area of a regular hexagonal pyramid. l

Cones Slant Height Cone

Theorem 10-4 Lateral Area and Surface Area of a Cone Lateral Area Radius Slant Height Surface Area Lateral Area Base Area

#4 Finding the Surface Area of a Cone The radius of the base of a cone is 5 m. Its slant height is 13 m. Find the surface area.

#5 Finding the Surface Area of a Cone The diameter of the base of a cone is 30 m. Its slant height is 25 m. Find the surface area.

#6 Finding the Surface Area of a Cone Find the slant height and the lateral area to the neatest whole number.

Assignment Page 540 #1-20