Help with 2008 CSSE Maths Question
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Help with 2008 CSSE Maths Question
Question 26 Maths - 2008
Please can someone help with this question.
The diagram shows a circle with circumference of 1cm being rolled around an equilateral triangle with sides of length 1cm.
How many complete turns does the circle make as it rolls around the triangle (without slipping) to its original starting position?
Thanks
Please can someone help with this question.
The diagram shows a circle with circumference of 1cm being rolled around an equilateral triangle with sides of length 1cm.
How many complete turns does the circle make as it rolls around the triangle (without slipping) to its original starting position?
Thanks
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- Posts: 92
- Joined: Sat Oct 10, 2009 4:04 pm
the answer is 4
there is a thread that explains it all further down the board , the circle basically turns an additional 1/3 of a turn at each corner to negotitate the turn without covering any ground on the triangle in addition to the obvious 3 rotations along each side - v tough question and for kids of this age its pretty ridiculous
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- Posts: 92
- Joined: Sat Oct 10, 2009 4:04 pm