The diagram shows a regular nonagon. O is the centre of the nonagon. a Work out the size of the angle labelled aº. b Explain why triangle OPQ is isosceles. c Ca
Mathématiques
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Question
The diagram shows a regular nonagon. O is the centre of the nonagon.
a Work out the size of the angle labelled aº.
b Explain why triangle OPQ is isosceles.
c Calculate the size of the angle labelled bº.
d
Use the answer to part c to explain why the interior angle
of a regular nonagon is 140°.
ha angles of a pentagon are gº
a Work out the size of the angle labelled aº.
b Explain why triangle OPQ is isosceles.
c Calculate the size of the angle labelled bº.
d
Use the answer to part c to explain why the interior angle
of a regular nonagon is 140°.
ha angles of a pentagon are gº