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romanna [79]
3 years ago
6

A rectangle has sides of length 8 cm and 3 cm. Find the length of it's diagonals.

Mathematics
2 answers:
True [87]3 years ago
6 0

Diagonal formula: a^2 + b^2 = c^2

Now, solve for the length of the diagonal.

8^2 + 3^2 = c^2

64 + 9 = c^2

73 = c^2

√73 = √c^2

8.5 ≈ c (This is the diagonal and its rounded).

Best of Luck!

slava [35]3 years ago
4 0
Using pythagoras a^2 + b^2 = c^2
8^2 + 3^2 = c^2
64 + 9 = 73
The square root of 73 is 8.54
So the length of the diagonals are 8.54cm
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Please help posted picture of question
Leni [432]
Hello!

First you factor 28

2^2 * 7 = 28

Now we have

\sqrt{2^{2} }  \sqrt{7}

If you take a square root of a square number they cancel out

2 \sqrt{7}

The answer is B)2 \sqrt{7}

Hope this helps!
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3 years ago
Which cereal tasty oats or corn bits has the higher ratio of protein
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Tasty oats, it has fats and nutrients, plus, it is organic
3 0
3 years ago
What is the perimeter, P, of a rectangle that has a length of x + 8 and a width of y - 1?
Ann [662]

Answer:

<em>P = 2x +2y + 14</em>

Step-by-step explanation:

5 0
3 years ago
Find the values for x and y.
vivado [14]
Both sides need to equal 180 (The side with the 90 degrees measurement and the side with equations). So first subtract 180 from 90
180 - 90
to get the measurement of 5x and you get 90 but we aren't done yet since we need to find x so now we need to divide 5 by 90
90 \div 5 = 18
and we get 18 which is X.
x = 18
Now we need to find the measurement of Y. Now both angles on that side together equals 180 so we need this equation.
5(y + 11) + 4y - 10 = 180
First, distribute 5(y + 11)
5 \times y \\ 5 \times 11
Then you get this equation :
5y + 55 + 4y - 10 = 180
Now, add the two equations together
5y + 55 + 4y - 10
and you get this equation

9y + 45 = 180
Now subtract 45 from both sides
9y + 45 - 45 = 180 - 45
and divide by 9 on both sides
9y \div 9 = 135 \div 9
and you get your answer
y = 15

So
x = 18
and
y = 15
8 0
3 years ago
Which property is demonstrated?<br> 16 + 7 + 9 = 7 + 9 + 16
Oxana [17]

B

Changing the order does not change the result of the equation

3 0
3 years ago
Read 2 more answers
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