Tutor MathsGuru: Ask me for your burning Maths questions!

[PiggyLalala]

:thankyou: for all the various approaches to find the area of shaded region.

:lovesite: There is just so much to learn in here.

[Brenda10]

tianzhu:

Brenda10:

She visualize the drawing and come with this this area is a small square with size of 4cm.

Hi Brenda10.

This question has been discussed previously in the PSLE Maths thread.

Best wishes

http://farm5.static.flickr.com/4105/5037820184_49243da940_z.jpg\">

http://farm5.static.flickr.com/4103/5037820252_8aa41e056c_z.jpg\">

Hi Tianzhu

Thank you so much for your picture and dd has learnt a new way to solve the problem. :lol:

[Brenda10]

Augmum:

Brenda10:

[quote=\"ChiefKiasu\"]Can your DD explain why she assumes that the height of triangle AFE to be 4cm?

Hi Chief
DD said she visualize the small area as a square.
Now she is worry and want to :siam:

hi brenda

Triangle AEF + triangle AFB = triangle AEB
(since AFC is a straight line and also diagonal of square ABCD)

Triangle AEB = ½ x 6 x 12 = 36
Triangle AEF = ½ x 6 x h (h = height of triangle AEF)
\t\t= 3 h
Triangle AFB = ½ x 12 x h
\t\t= 6 h
( same h as AFC is a straight line and also diagonal for sq ABCD)

3h +6 h = 36
9 h = 36
\t h = 4
The height of the triangle AEF is 4 cm

amirtha:

Dear Maths Guru
Could you pls help to solve the below P6 question.
http://i56.tinypic.com/33m0nm1.jpg\">
thks

[/quote]Hi augmum

Thank you for your help on explaning of how to get the height. :lol:

[PiggyLalala]

MathIzzzFun:

PiggyLalala:

[quote=\"MathIzzzFun\"]

Hi

The worked solution

http://i54.tinypic.com/29dern8.jpg\">

cheers.

Nice Solution but again how do we explain that the height of triangle Y and Z to be the same.

Hi

copy triangle ADG and paste it over triangle ABE, and you will see that Y and Z overlaps and are the same - ADG and ABE are reflections in the axis AC.

cheers.[/quote]Sorry to have asked you so many questions.
:thankyou: for your time and effort. Thank you very much.

[WLRR]

Hi


Pls help with this question:

At present, Raymond is 3 times as old as his cousin. In 22 years’ time, Raymond’s age will be 19 years less than twice his cousin’s age. How old is Raymond now?

[MathIzzzFun]

WLRR:

Hi


Pls help with this question:

At present, Raymond is 3 times as old as his cousin. In 22 years' time, Raymond's age will be 19 years less than twice his cousin's age. How old is Raymond now?

hi

http://i55.tinypic.com/2r3w4yu.jpg\">

cheers.

[WLRR]

Hi MathIzzzFun


Thank you for your help!

[MathIzzzFun]

WLRR:

Hi MathIzzzFun


Thank you for your help!

u r welcome

cheers.

[KoalaMummy]

Mary had 1/4 as much money as Jane. Their uncle gave them $4 each and as a result, Mary had 2/5 as much money as Jane. How much money did each of the girls have at first? (same 'gap' as the same amount was given to both girls)

[KoalaMummy]

The ratio of the number of apples to oranges is 3:5. Mr Tham bought another 20 apples and 20 oranges and as a result, the ratio of the number of apples to oranges became 7:10. How many apples did Mr Tham have at first? (same ‘gap’ as the same number of apples and oranges were bought)