Mensuration

11

Contents:

A Surface area [6.4]

B Volume [6.1, 6.4]

C Capacity [6.1, 6.4]

D Mass [6.1]

E Compound solids [6.5]

Opening problem

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How often will Chun need to empty the container?

In this chapter we deal with measurements associated with 3 -dimensional objects. These may be solids

which havemass,surface area, andvolume, or containers which can hold a certaincapacity.

The shapes we deal with includeprismsandpyramidswhich have all flat orplane faces, andcylinders,

conesandsphereswhich havecurved surfaces.

SOLIDS WITH PLANE FACES

Thesurface areaof a three-dimensional figure with plane faces is the sum of the areas of the faces.

A SURFACE AREA [6.4]

(solids and containers)

Chun’s roof is leaking. ml of water is dripping onto

her floor every minute. She places a cm by cm by

cm container under the leak to catch the drops.

10

10 8

3

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Y:\HAESE\IGCSE01\IG01_11\231IGCSE01_11.CDR Tuesday, 28 October 2008 3:16:04 PM PETER