Cambridge International Mathematics

108 Lines, angles and polygons (Chapter 4)

de

3 Decide if the figure contains parallel lines,

giving a brief reason for your answer:

4 Find the value ofxin:

ab c

5 What can be deduced about triangle ABC shown?

Give reasons for your answer.

6 Find, giving reasons, the values of the unknowns in:

abc

7 Find the value ofxin each of the following, giving reasons:

abcd

125°

(x-10)°

x°

60°

58° 62°

x°

44°

x°

118°

56°

A

B

C

130°

50°

72°

x°

76° 5m 60°

x° ym

3°x

()x+20°

x°

x°

85°

145°

x°

x°

x° x°

x°

x°

140°

120°

x°

105°

x°

55°

x°

y°

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Y:\HAESE\IGCSE01\IG01_04\108IGCSE01_04.CDR Wednesday, 17 September 2008 10:57:54 AM PETER