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Mrs Tibble’s Year 8554 comments to Mrs Tibble’s Year 8 |
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Hi Mrs Tibble
just signing in!
just logging in too
Hi Mrs Tibble
Sorry I’m a bit late signing in!!!!
Mrs T im a bit stuck on p7 question 2 prt c angles u and v also I’m stuck on the whole of d thank you
Hi Lucy1,
You need to look again at 2c – it uses the 2 rules we used in class today.
For 2d you need to use what you know about angles and parallel lines (look in your year 7 folder or use the disc in the HW book and look at page 33 or google ‘angles and parallel lines)
You should be OK now
JT
Hi mrs tibble
Manana
Si, Gemma, mañana!
Thanks so much mrs T
hi mrs T so sorry this is late
hi mrs tibble
i dont understand q1 and q2 b and d
elise
Hi Elise,
Have you got the question numbers wrong? Do you mean 2 and 3? (I didn’t set Q1)
What’s the problem in 2? Work out the missing angles in the diagrams, just like you were doing in class. The reasons you will need are in the table for you so you can just give its number rather than writing it out fully.
For 3b look in the table in Q2 to find what supplementary means.
d you can do.
JT
Hi mrs Tibble sorry this is late.
ok. thanks
hi just logged in
Hi Amy,
Don’t put your e-mail address in the name box please because it comes up on the blog then, and this is a public site. I have edited it out.
JT
Hello,
Just signing in
Grace
hi mrs tibble i dont understand the table and what we have to do
elise x
Fill it in Elise! You had the first 2 lines to show you what to do so just do exactly what I did:
First line:
No of sides: 3
Name of shape: triangle
Sum of exterior angles: 360 degrees
Sum of interior angles: 180 degrees
Now do the same for all the polygons up to 12 sides. You may need to google their names if you don’t know them.
Use your notes to help you – that’s what they are there for.
Mrs T
oh ok . thanks
i don’t understzand the table mrs tibble
Rebecca, read what I wrote above for Elise. The first line is there.
The second line is for 4 sided shapes. What do we call them? (that goes in the 2nd column)
What do the exterior angles add up to? 360 degrees because if you look in your notes it tells you that’s the same for all polygons. (that goes in the third column)
Last column – what do the angles inside it add up to?
Now do the same for the other numbers of sides. If you don’t know their names, Google polygons.
Mrs T
hi mrs tibble,
what’s a polygon?
Hi Lauren,
You sat through a 1 hour lesson on polygons this morning and not once asked me this question!! It’s a flat shape (2D) with straight sides eg triangle, quadrilateral, hexagon etc.
Mrs T
oooooh yeah! sorry…
hi mtrs tibble
for the homework i dont understand it.
elise x
Elise, you need to be a lot more specific than that!
First of all you need to read through what we did in the lesson because you will need to use it in your answers – and don’t just read it, think about what it means.
Secondly you need to ask a specific question about which point you are actually stuck with. The way you have phrased your question would suggest that you have only got as far as opening the question book and haven’t done much thinking yet.
I’ve just had a look at question 2 and you actually wrote that down in the lesson on Monday, so you need to be a bit more proactive!!
Come back when you’ve had a decent go at the questions.
Mrs T
HI HOW DO YOU CALCULATE THE INTYERIOR AND EXTERIOR ANGLES AGAIN??
Read your notes Elise!
You wrote this down in your book and put stars by it because it was so important.
Exterior angles always add up to 360 so if you know how many there are, you can divide by that number to find the size of each one.
Once you know the exterior, you can work out the interior – it’s the 2nd thing you starred in your book.
JT
hi mrs.tibble
how do you work out Q7 again?
Hi Lucy-2,
Start by drawing the diagram in your book (not too small).
Then to work out which angle you need (it’s the middle letter) go over the lines in the order of the letters. Use colours if it helps.
So, the first one – angle BCF
with a coloured pen start at B, draw along to C then along to F
the angle in the corner of your two lines (at C) is the angle you need to work out.
You should be OK with the others now. You will need a combination of rules about angles in polygons and angles and parallel lines in order to answer all of this question.
Good luck
Mrs T
Hi Mrs Tibble,
I missed Tuesdays lesson this week and i was just wondering if we had any homework.
Grace
Hi Grace,
It was collecting in books day so you’re off the hook
Mrs T
PS Hope the rehearsal went well!
Hi Mrs T,
I am findind q5 on p44 of the homework book very diffucult!!!! Please could you help me?
Also, I put a fake email address – it wouldn’t let me post a question otherwise.
Hi Emmanuelle,
Not sure what the problem is.
They give you a formula to work out how much flooring to buy.
The room is a rectangle (how do you work out the area of a rectangle?)
Work the answer out approximately using the rounding they give you.
Then work it out exactly using the proper numbers.
Compare your answers to do part c.
The reason it is multiplied by 1.1 is that you always buy slightly more than you need.
Does that help?
JT
Hi Mrs Tibble i’m a bit stuck on tonights homework question 3 for the LCM of 8 and 12 i got 96 when i did the factor tree (i think i made an arithmetic mistake) but then to check it i tried the other method i got 12 but i think it’s 12 but not sure please help!!!
Hi Lucy1,
12 isn’t in the 8 times table so it can’t be right!
Do your 8 times table and your 12 times table a bit at a time, and stop when you get the FIRST match. That’s the LCM value.
Mrs T
Hi Mrs Tibble..imbhaving some trouble with tonights homework.
I dont really understand when it says “use prime factor decomposition” on question 5 on page 3..
Hi Juliette,
That means factor trees. Break the number down (decompose) into its prime factors.
Mrs T
Ok thanks
J
Hi Mrs Tibble, i am in Mr Brewin’s maths class but i am a bit stuck on a question involving changing top heavy fractions/mixed numbers in to percentages, was wondering if you had any ideas Thank you
Greta
Hi Greta,
With percentages, 100% is a whole, so if you have a mixed number every whole number will be 100%. The fraction part of your number will be less than 100%.
For example: three and a half (sorry can’t type mixed numbers easily on here)
the half will be 50%
the 3 will be 300%
so altogether you have 350%
And before you ask, yes you can have percentages more than 100 but it can’t happen in a maths test lol!
With top heavy fractions, turn them into mixed numbers and solve as above.
Hope that helps you to make some progress. Come back when you’ve tried some and tell me how you’re getting on.
Mrs T
Thank you, i can see now and i have done the question! Thanks, Greta
Hello Mrs Tibble,
I don’t understand Q 6 Pg32…
Hi Lauren,
Work out the area of each shape and then compare your answers. They all work out to the same answer except for one so that shape will be the odd one out.
Mrs T
hi mrs tibble
i don’t really understand the homework you set us?
Elise x
Hi Elise,
If you multiply the diameter by pi to get the circumference, what do you do to the circumference to get back to the diameter?
Mrs T
hi,
im a bit confused by a question in the 8A books, about comparing the volume of a cuboid to the volume of a cylinder, and the cylinder has a bigger volume when they practically have the same measure ments, 38cm in hight, and then on the cuboid 24 by 24cm, and a 24cm diameter?
Thank you
Greta
Hi Greta,
The reason they have different volumes is because their cross sections are different.
Imagine slicing them up along their lengths:
With the cylinder, you would get 38cm of circles and with the cuboid, you would get 38cm of squares.
If that doesn’t make sense, try this:
Because the cylinder and the cuboid are as wide as each other, imagine putting the cylinder on top of the cuboid. The corners of the cuboid would be sticking out, so there must be more ‘stuff’ in the cuboid. That means its volume is bigger than the cylinder’s.
Hope that helps.
Mrs Tibble
Hi Mrs Tibble
About the revistion product i realse that i was not hear last week and it was about the formulae on area and volume so i am not sure what to do.
From Rachel
Hi Rachel,
I would start by doing the ones you know first, then copy up what you missed as soon as possible.
Mrs T