Question 5 — IGCSE 0580 Oct/Nov 2025 Paper 43
Cambridge IGCSE Mathematics 0580, Extended tier, calculator. Topic: Geometry · Symmetry. Worth 4 marks.
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Question text
5 (a) The diagram shows a regular decagon.
AB is a line of symmetry of the decagon.
A
NOT TO
d °
SCALE
B
W ork out the value of d.
d = ................................................ [3]
(b) The exterior angle of a regular polygon with n sides is 45°.
W ork out the value of n.
n = ................................................ [1]
M
SIHT
NI
ETIRW
TON
OD
NIGRAM
SIHT
NI
ETIRW
TON
OD
NIGRAM
SIHT
NI
ETIRW
TON
OD
NIGR
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