# Maths lecturer is left baffled by his seven-year-old daughter's geometry homework and turns to Twitter for help - so can YOU work out if it's true or false?

**Dr Kit Yates shares his seven-year-old daughter's maths homework to Twitter****The question asked students whether a semi-circle had 'two right angles' or not****The maths lecturer, from Oxford, admitted that he was stumped by the problem****People were left baffled by the question and came up with conflicting A maths lecturer left baffled by his seven-year-old daughter's geometry homework took to Twitter to ask for help.**Dr Kit Yates, co-director of the Centre for Mathematical Biology at the University of Bath and author of The Maths of Life and Death, shared his daughter's maths worksheet to Twitter in a bid to find out the correct answer.

The question, accompanied by an image of a semi-circle, asked students: 'True or false? This shape has two right angles. Explain your answer.'

Dr Kit Yates, co-director of the Centre for Mathematical Biology at the University of Bath, shared his daughter's maths worksheet (above) to Twitter in a bid to find out the answer

The father-of-two, from Oxford, revealed that he would be setting the difficult question for his university students next week - despite it being aimed at his seven-year-old child

Sharing the problem to Twitter, the father-of-two wrote: 'This was my daughter's (7) maths homework on Monday. Can someone help me out with the answer?'

He added: I'm not being facetious here. I'm genuinely not sure what I should advise her the correct answer should be.'

Dr Yates, from Oxford, also explained that as far as he was aware, the question was his daughter's 'first introduction to angles'. answers The question left people stumped, with many people insisting that it seemed to be a rather challenging piece of maths for such a 'young' student.Mathematicians pointed out that technically the answer would be 'true', penning: 'Tangent to curve at the corner is vertical, so 2 right angles, no?'

While another said: 'I'm going for yes, on the basis that in as much as a single angle exists for a curved line it should be 90 degrees at those two points. (ie there's no other single value that makes sense).'

Many Twitter users had a go at answering the question for themselves, but came back with very conflicting answers that seemed to confuse the issue further

And another person simply fumed: 'Excuse the language, but who the f**k sets homework questions like this for seven year olds?

'I studied philosophy of mathematics and could write a f**king dissertation trying to answer this question.'

However other Twitter users insisted he was overthinking and that the answer is 'false'.

Someone eventually revealed the completed worksheet, which revealed that this was indeed the case.

The solution claimed: 'False. Children could show this by using the corner of a page to show there aren't any right angles.'

But according to an answer sheet found online, the answer was in fact false, claiming that children could use the 'corner of a page' to show there were no right angles

Dr Yates admitted the question was very difficult, telling The Mirror that he believed there was a strong case for claiming that the answer was 'true' as well as 'false'.

He also revealed that he would be setting the question for his university students next week following the lively Twitter debate.

He told the publication: 'It's actually a really deep and thought-provoking question which could be used later on in school to spark conversations about infinity, tangents, calculus and many more interesting mathematical concepts, but it might not be best for seven-year-olds being homeschooled by their parents!

'I'm going to set it as a riddle for my second year University Maths students next week to see what they come up with.'

Assuming that a circle is a polygon of infinite sides, the part of the circle will at the point of intersection with the straight line have 2 right angles infinitely short in size, but none the less right angles. But this willo only be exactly at the point of contact.

ReplyDeleteNot correct: every point on a circle has the same radius.

DeleteBut, the vertical lines that intersect the end points of that diameter

are slightly further away from the circle at all other points on

those vertical lines. Therefore, the answer is FALSE.

Yes, it has two right angles. Not only did the person making the test answer wrong, but is absolutely NOT a question appropriate for introducing 7 year olds to the concept. Teacher fails.

ReplyDeleteALL ANGLES ARE CREATED USING STRAIGHT LINES. EUCLID IS GEOMETRY. THERE IS NO OTHER.

ReplyDeleteA circle is not a polygon of infinite sides. There is geometry involving curved lines and space.

ReplyDeleteIf you magnify the angles concerned, to extreme, even infinite levels, the curved lines

will always leave the straight line at slightly less than 90', if infinitely close to 90'.

IMHO