Tool Bag

1
10-5 Surface Area of Pyramids and Cones
Name Date Period
Tool Bag Formulas, equations, Vocabulary, etc.
Heres HowNotes Examples
Standard MG 2.1 Use formulas to find volume and
surface area of three dimensional shapes.
Objective
to find the surface area of pyramids and cones.
Cone
Regular Pyramid
Slant Height
12
To find surface area lay it flat
Base Area Lateral Areas
Base Area Triangle Areas
Surface Area
p r²
p r slant height
8 8
4(½ 8 12)
64 4(4 12)
p 3² p 3 12
9p 36p
64 4(48)
45p
64 192
141 in²
256 in²
2
10-5 Surface Area of Pyramids and Cones
Name Date Period
Tool Bag Formulas, equations, Vocabulary, etc.
Heres HowNotes Examples
Standard MG 2.1 Use formulas to find volume and
surface area of three dimensional shapes.
Slant Height
12
8
8
12
Surface Area Option 2
Base Area ½ Base Perimeter Slant Height
8 8
½ (8 8 8 8) 12
64 ½(32) 12
64 16 12
64 192
256 in²
3
10-5 Surface Area of Pyramids and Cones
Name Date Period
Tool Bag Formulas, equations, Vocabulary, etc.
Heres HowNotes Examples
Standard MG 2.1 Use formulas to find volume and
surface area of three dimensional shapes.
You Try
a)
b)
8
6
9
5
5