Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -

Login

Username

Password

Not registered yet?

Post a reply

Go back

Write your message and submit
:) :| :( :D :o ;) :/ :P :lol: :mad: :rolleyes: :cool: | :dizzy :eek :kiss :roflol :rolleyes :shame :down :up :touched :sleep :wave :swear :tongue :what :faint :dunno
Options

Go back

Topic review (newest first)

zee-f
2012-11-25 07:21:32

Thank you big_smile

bob bundy
2012-11-25 07:18:47

And also 206 is correct.  Excellent!

Bob

bob bundy
2012-11-25 07:15:49

hi

Q18 correct.  Well done!

Just give me a moment and I'll post again on the other one.

Bob

zee-f
2012-11-25 07:11:58

20. What is the area of this polygon?

I got F


A 178 sq units
B 129 sq units
C 230 sq units
D 240 sq units
E 219 sq units
F 206 sq units

zee-f
2012-11-25 06:36:31

ok So I got :

xvef= 3816

bult= 2728

RMCD= 1470

3816 + 2728 + 1470 = 8014 mm2

bob bundy
2012-11-24 07:43:10

Well it looks to me like RMCD is a rectangle, so RD = MC.

Then VE = VR + RD + DE

Or XVEF is a rectangle so VE = XF.

Try both ways and check they give the same answer.

And FE = XV

Or BE = TL - EU then FE = FB + BE

Hope that covers everything you need.

Bob

zee-f
2012-11-24 07:27:59

but how do i get VE and FE?

bob bundy
2012-11-24 00:19:06

B is correct.

Bob

zee-f
2012-11-23 22:16:07

I choose B for the first one and am working on #18

bob bundy
2012-11-23 19:24:59

hi zee-f

For the first, I cannot see what answer you chose.

Did you work out the width first ?

For Q18, start by making a drawing on paper.  It doesn't have to be accurate, just make it look roughly like the given drawing.

Then mark on all the distances.

Split the shape into rectangles.  There's more than one way of doing this step.  I've shown one way on my diagram.

Using the length and width* for each rectangle, write down its area.

Add them up and you're done.

* You might have to do some adding or subtracting to work out the distances you need.

Bob

zee-f
2012-11-23 13:13:02

And I really need help with this :

18. What is the area of this polygon?

ls_XF    =    53 mm    ls_XV=    72 mm    ls_VR=    16 mm
ls_FB    =    31 mm    ls_BT    =    31 mm    ls_EU    =    47 mm
ls_UL    =    31 mm    ls_TL    =    88 mm    ls_DE=    16 mm
ls_RM=    70 mm    ls_MC=    21 mm    ls_DC=    70 mm



A- 8014 mm2
B- 7030 mm2
C- 6027 mm2
D- 5478 mm2
E- 1782 mm2
F- 1225 mm2

zee-f
2012-11-23 13:09:19

I was wondering if my answer is correct

What is the area of this rectangle(in the img)?

A 17.06 sq units [img][/img]
B 60 sq units
C 21.6 sq units
D 53 sq units
E 28.9 sq units
F 51 sq units

Board footer

Powered by FluxBB