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24.09.2019 •
Mathematics
Abcd is a square
the measures shown in the diagram are to the nearest meter
find the least possible area of the shaded region
( plz idk what it means by least possible area)
plz me solve this : ))
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Ответ:
you have to find the upper and lower bound of each measurement:
LB of 12 (nearest m) is 11.5m
UB of 12 is 12.5m
cuz anything between the bounds to the nearest metre will give 12
LB of 6 is 5.5
cuz any numbers between 5.5 and 6 rounded to the nearest whole number is 6
UB 6 is 6.5
cuz any numbers between 6 and 6.5 will round down to the nearest metre as 6
LB of 7 is 6.5
UB of 7 is 7.5
for the LEAST possible area you have to try and get the lowest possible value.
to get the lowest number, you have to do the LB - UB because a small number - a large number will give u a small number.
first find the area of the small rectangle and it has to be the largest area possible so you can minus a big number later on.
to do this multiply the upper bounds:
6.5 × 7.5 = 48.75 m squared
then find the area of the large square but this time you use the lower bounds.
11.5 × 11.5 = 132.25m squared
then minus these numbers.
132.25 - 48.75
= 83.5 m squared
Ответ:
Please complete the question..
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