anonymous
  • anonymous
a triangle and a rectangle are drawn on a page so that they overlap as shown. inside these figures are placed the digits from 0 to 9. if there are six digits in the triangle and eight digits in the rectangle, how many digits are in the part that belongs to both figures
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
i dnt ge the working out
anonymous
  • anonymous
get*
hartnn
  • hartnn
six digits in the triangle-->Let T =6 eight digits in the rectangle---->Let R=8 Total = 10 digits. = T union R (in other words, T OR R) get this much ?

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More answers

anonymous
  • anonymous
how do u get 10 digits?
hartnn
  • hartnn
0 to 9 means total 10 digits i assumed that the digits are not repeated, which is a fair assumption here...
anonymous
  • anonymous
ohk...no they not repeated
hartnn
  • hartnn
digits are in the part that belongs to "both" figures = T AND R (T intersection R) = ...... there is a formula for this, you know ? in terms of T,R and T UNION R
anonymous
  • anonymous
but..how do u do year 7 working out..im suposed to draw the diagram and stuff..
hartnn
  • hartnn
'year 7 working out.' ?? i didn't get you..
hartnn
  • hartnn
|dw:1352896076101:dw|
anonymous
  • anonymous
im in year 7
anonymous
  • anonymous
|dw:1352896192555:dw|
anonymous
  • anonymous
that's what the question look like
hartnn
  • hartnn
|dw:1352896267033:dw| i am not sure i can give you exact working required by your course/teacher, but i can make u understand how to get the answer....
anonymous
  • anonymous
ok..
hartnn
  • hartnn
now look at that figure, if u want total area of composite figure, will it be appropiate to add the area of triangle and rectangle ?
anonymous
  • anonymous
um...no?
hartnn
  • hartnn
why ?
anonymous
  • anonymous
i don't know
anonymous
  • anonymous
by the area of composite figure do u mean the overlapped shape?
hartnn
  • hartnn
yes,. because then you will consider the "intersection part" twice. once in rectangle and once in triangle, got this ?
anonymous
  • anonymous
um..kinda
hartnn
  • hartnn
so to get area of composite figure, u need to subtract are of intersection, right ?
anonymous
  • anonymous
..uh..yea..
hartnn
  • hartnn
so , we get TOTAL = RECT +TRIANGLE - INTERSECTION. in this case, total = 10 , Rect = 8, triangle =6 u just need intersection
anonymous
  • anonymous
uhuh
hartnn
  • hartnn
not clear ?
anonymous
  • anonymous
clear
hartnn
  • hartnn
so, 10 = 8+6-x where x is digits that belongs to both figures
hartnn
  • hartnn
x= ?
anonymous
  • anonymous
hmm equations..lets see
anonymous
  • anonymous
4?
hartnn
  • hartnn
yes, so there are 4 numbers that belong to both..
anonymous
  • anonymous
ohk..
hartnn
  • hartnn
will u be able to solve similar problems ?
anonymous
  • anonymous
i think so yes
anonymous
  • anonymous
thnx for ur help hartnn
anonymous
  • anonymous
now i need to get back to my other hw
hartnn
  • hartnn
welcome ^_^ and good luck....
anonymous
  • anonymous
thnx for help!!!

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