Homework Help - Year 9 Maths

[Paroxysm]

Hey if someone can work these out for me, I'll love ya forever.


8a) Find the base length of a triangle whose area is 36cm² and whose height is 4 cm.
  b) A rectangular postage stam 12mm long by 8mm wide has the same area as a Circular Stamp. Find the Diameter of the circular postage stamp to one decimal    place
  c) A god metal plate in the shape of a equilateral triangle with side length 10cm has a 5cm square neatly cut of it, Find

   i) The area of the gold cut out
   ii) the area of gold left over


Probably easy stuff, but I'm not too good with this area of maths..

Thanks if someone can work it out 

[VMNT]

Area of a triangle = (baseXheight)/2

So, 36cm²= (BaseX4)/2
                                                               Multiply the whole thing by 2
72cm²= Base X 4
                                                              Divide the whole thing by 4
18cm=Base



To check...

(BaseXheight)/2       

18X4= 72

72/2 = 36

[Abraham]

wow... I'm still having problems trying to figure out 4+7...

VMNT, I'm starting math next semester, I think... Mind being my personal "mathproblemsolver" ? :o

[Watti]

i Can do C for u

  c) A god metal plate in the shape of a equilateral triangle with side length 10cm has a 5cm square neatly cut of it, Find

   i) The area of the gold cut out
   ii) the area of gold left over
SOOO

C..

cos
Area of Sq = SxS
5x5 = 25Cm²

Of cause Equallateral is all equal sooo

BxPH/2
10x10/2
50Cm²

THEN minus 25Cm² Away from 50Cm²
= 25Cm²

[Omri]

To be honorst i dont undestand ANYTHING what you type now . I sux to math and im lucky i dont have it anymore

[Hess]

I'm good at maths, just not that type of maths... :roll:

[Paroxysm]

Thanks all

[Watti]

Was i right?

[Paroxysm]

Was i right?

I'm not sure, We get the sheets back tomorrow.

[Gird3r]

Relying on other people for answers and theorys is not always right, therefor i suggsest you check the theorys instead accepting them right away.


*Btw I hate maths  :razz:*

[Paroxysm]

Relying on other people for answers and theorys is not always right, therefor i suggsest you check the theorys instead accepting them right away.


*Btw I hate maths  :razz:*

Haha I got my results today - 100%

Thanks Watti and VMNT  <3

[Watti]