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morgam04512004
08.07.2021 •
Mathematics
Find the area of the rhombus
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Ответ:
Ответ:
240
Step-by-step explanation:
it is 4 times the area of these right-angled triangles.
we calculate the area of one, and then multiply by 4 as they are all the same.
the missing side is (using Pythagoras)
17² = 8² + side²
289 = 64 + side²
side² = 225
side = 15
area of one triangle
T = 8×15/2 = 4×15 = 60
the rhombus area is
R = 4×T = 4×60 = 240
Ответ:
First of all these type of questions are logical so we should look the sequence of numbers and try to find a relation between them
So what we see
First number =4. 2nd=9 3rd=17 . 4th =35. 5th is 69 then X then277
As you can see if we take the first number which is 4 and multiply it by2 and then add one we get 9
4×2+1=9
Now we take 2nd number that is 9
Now multiply 9 by 2 and substraction 1from the result we get 17 which is 3rd number
9×2–1=17
Now we take 17 multiply it by two and add one we get 35
So here we get the idea of what is going on with those numbers
‘To get the next term we have to multiply the number by 2 and then add and substract alternately '
So here we get the sutra (method).
So now it is easy to find the value of X
The number before X is 69
So now multiply it by 2 and then add 1
That is
69×2+1=139
So the value of X is 34
Now if you want to check it's correct or not then multiply it by two and substract one as we have to add and subtract one alternately so here we go
139×2–1=277
Which is the number .so our method is 100% correct.
PEACE!!
PLZ GIVE BRAINLIEST!