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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
 one year ago
 one year ago
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
 one year ago
 one year ago

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shewolfangzBest ResponseYou've already chosen the best response.1
i dnt ge the working out
 one year ago

hartnnBest ResponseYou've already chosen the best response.1
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 ?
 one year ago

shewolfangzBest ResponseYou've already chosen the best response.1
how do u get 10 digits?
 one year ago

hartnnBest ResponseYou've already chosen the best response.1
0 to 9 means total 10 digits i assumed that the digits are not repeated, which is a fair assumption here...
 one year ago

shewolfangzBest ResponseYou've already chosen the best response.1
ohk...no they not repeated
 one year ago

hartnnBest ResponseYou've already chosen the best response.1
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
 one year ago

shewolfangzBest ResponseYou've already chosen the best response.1
but..how do u do year 7 working out..im suposed to draw the diagram and stuff..
 one year ago

hartnnBest ResponseYou've already chosen the best response.1
'year 7 working out.' ?? i didn't get you..
 one year ago

shewolfangzBest ResponseYou've already chosen the best response.1
dw:1352896192555:dw
 one year ago

shewolfangzBest ResponseYou've already chosen the best response.1
that's what the question look like
 one year ago

hartnnBest ResponseYou've already chosen the best response.1
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....
 one year ago

hartnnBest ResponseYou've already chosen the best response.1
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 ?
 one year ago

shewolfangzBest ResponseYou've already chosen the best response.1
by the area of composite figure do u mean the overlapped shape?
 one year ago

hartnnBest ResponseYou've already chosen the best response.1
yes,. because then you will consider the "intersection part" twice. once in rectangle and once in triangle, got this ?
 one year ago

hartnnBest ResponseYou've already chosen the best response.1
so to get area of composite figure, u need to subtract are of intersection, right ?
 one year ago

hartnnBest ResponseYou've already chosen the best response.1
so , we get TOTAL = RECT +TRIANGLE  INTERSECTION. in this case, total = 10 , Rect = 8, triangle =6 u just need intersection
 one year ago

hartnnBest ResponseYou've already chosen the best response.1
so, 10 = 8+6x where x is digits that belongs to both figures
 one year ago

shewolfangzBest ResponseYou've already chosen the best response.1
hmm equations..lets see
 one year ago

hartnnBest ResponseYou've already chosen the best response.1
yes, so there are 4 numbers that belong to both..
 one year ago

hartnnBest ResponseYou've already chosen the best response.1
will u be able to solve similar problems ?
 one year ago

shewolfangzBest ResponseYou've already chosen the best response.1
thnx for ur help hartnn
 one year ago

shewolfangzBest ResponseYou've already chosen the best response.1
now i need to get back to my other hw
 one year ago

hartnnBest ResponseYou've already chosen the best response.1
welcome ^_^ and good luck....
 one year ago
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