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1.
C: Circumference

2.
Cone: *resembles a pyramid, but base is a circle

*unlike a pyramid, slant height=lateral edge

*unlike a pyramid, slant height=lateral edge

3.
Cylinder: Resembles a prism in having two congruent parallel bases. but the bases are circles

4.
h: Height

5.
ℓ: slant height

6.
L.A. of a Cone: 1/2 Cℓ

(π r) ℓ

(π r) ℓ

7.
L.A. of a Cylinder: Ch

(2 π r)h

(2 π r)h

8.
r: Radius

9.
Sphere: A special figure with a special surface-area formula.

10.
T.A. of a Cone: L.A. + the area of the base

11.
T.A. of a Cylinder: L.A. + 2 (area of base)

12.
T.A. of Sphere: 4 π r^2

## Geometry Chapter 12 Section 3Study online at quizlet.com/_35h2a |

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