Cambridge International Mathematics

198 Mensuration (length and area) (Chapter 9)

AREA FORMULAE

You should remember these area formulae from previous years:

Rectangles

Area=length£width

Triangles

Area=^12 (base£height)

Parallelograms

Area=base£height

Area=

"The average of the

lengths of the two

parallel sides

#

£

·

the distance between

the parallel sides

̧

A=

μ

a+b

2

¶

£h or A=^12 (a+b)£h

Example 5

Find the area of:

ab c

Self Tutor

length

width

height

base base base

base

height

a

b

h

COMPUTER

DEMO

COMPUTER

DEMO

COMPUTER

DEMO

Trapezia

5m

12 m

5cm

10 cm

4m

16 m

11 m

IGCSE01

cyan magenta yellow black

(^05255075950525507595)
100 100
(^05255075950525507595)
100 100
Y:\HAESE\IGCSE01\IG01_09\198IGCSE01_09.CDR Tuesday, 23 September 2008 10:33:18 AM PETER