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Published byRonald Rogers Modified over 5 years ago

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**Chapter 9 9.3: Surface Area and Volume of Pyramids**

Geometry Chapter 9 9.3: Surface Area and Volume of Pyramids

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**Parts of a Pyramid Base: polygon Lateral faces: triangles**

Vertex: where all ‘s meet Base edge: where and base meet Lateral edge: intersection of 2 Altitude: perp segment from base to vertex Height: length of altitude

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**Regular Pyramid: base is regular polygon**

Slant height: altitude of lateral face

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**Surface Area of a Regular Pyramid:**

7.3 Surface Area and Volume of Pyramids Surface Area of a Regular Pyramid: S = 1 2 lp + B . B=base area p= perimeter l= slant height

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Volume of a Pyramid : 1 3 Bh V = . H=height B=base area

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**Key Skills Find the surface area of a regular pyramid. S = lp + B 1 2**

7.3 Surface Area and Volume of Pyramids Key Skills Find the surface area of a regular pyramid. S = 1 2 lp + B

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**Key Skills Find the volume of a regular pyramid. V = Bh 1 3 TOC**

7.3 Surface Area and Volume of Pyramids Key Skills Find the volume of a regular pyramid. V = 1 3 Bh TOC

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**If the surface area of the pyramid is 180 cm, find x.**

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**The surface area of a square pyramid**

is 864 m, if the slant height is 15m and the height is 12 m, what is the length of each side of the base?

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