Cambridge International Mathematics

380 Similarity (Chapter 18)

Review set 18A

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1 Draw two equiangular quadrilaterals which are not similar.

2 Find the value ofx:

ab

3 Findx, given that the figures are similar:

4 Show that the following figures possess similar triangles.

abc

5 Find the value of the unknown in:

ab

6 Find the unknowns for the following similar figures:

ab

7 Parallelograms ABCD and EFGH are similar.

Find: a x b y

x

1.1

5

3

2cm

xcm 5cm

7cm

AB

X

CD

A

B

E

D

C

78°

78°

P

Q

RST

18.7 m

11.2 m

10.8 m

xm

xcm

4cm 6cm

3 7

4

x

24 m

63 mX 8m

AmX

xcm

250 cmC

100 cmC

6cm

4cm

10 cm

A

B

C

D

ycmX

72 mX

E

F

G

xm H

6m

IGCSE01

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y:\HAESE\IGCSE01\IG01_18\380IGCSE01_18.CDR Thursday, 23 October 2008 11:51:18 AM PETER