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adelina 88 [10]
2 years ago
10

What is the height of a triangle withbase 7cm and area of 35cm 2​

Mathematics
1 answer:
marshall27 [118]2 years ago
5 0

Step-by-step explanation:

okay I think you can solve this question now

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Does anyone know how to do this ??? <br> -view attachment
cricket20 [7]

As soon as I read this, the words "law of cosines" popped
into my head.  I don't have a good intuitive feeling for the
law of cosines, but I went and looked it up (you probably
could have done that), and I found that it's exactly what
you need for this problem.

The "law of cosines" relates the lengths of the sides of any
triangle to the cosine of one of its angles ... just what we need,
since we know all the sides, and we want to find one of the angles.

To find angle-B, the law of cosines says

       b² = a² + c² - 2 a c cosine(B)

B  =  angle-B
b  =  the side opposite angle-B = 1.4
a, c = the other 2 sides = 1 and 1.9

                  (1.4)² = (1)² + (1.9)² - (2 x 1 x 1.9) cos(B)

                 1.96  =  (1) + (3.61)  -  (3.8) cos(B)

Add  3.8 cos(B)  from each side:

                 1.96 + 3.8 cos(B) = 4.61

Subtract  1.96  from each side:

                             3.8 cos(B) =  2.65

Divide each side by  3.8 :

                                  cos(B)  =  0.69737  (rounded)

Whipping out the
trusty calculator:
                                 B  = the angle whose cosine is 0.69737

                                      =  45.784° .

Now, for the first time, I'll take a deep breath, then hold it
while I look back at the question and see whether this is
anywhere near one of the choices ...

By gosh !  Choice 'B' is  45.8° !                    yay !
I'll bet that's it !

8 0
3 years ago
Find the 12th term of the geometric sequence 9, 27, 81...
stellarik [79]

Answer:

1594323

Step-by-step explanation:

4 0
3 years ago
What numbers are a distance of 2/3 unit from 1/2 on a number line?
Eddi Din [679]

Answer:  1/6

Step-by-step explanation:

4 0
2 years ago
The median of 15, 17, 13, 19, 20, 33, 22, 12, 18, and ◼ is 18.5. Is it possible to determine the missing value?
yanalaym [24]

It is NOT possible to determine the missing value from the given data.

<h3>Mean and Median</h3>

Mean is the average of a number of data while the median is the number at the middle of the given data.

  • For a given data with a missing value, we can only find the missing value by calculating the mean of the data and equating the given mean.

Hence from the given data, it is NOT possible to determine the missing value from the given data.

Learn more on median and mean here; brainly.com/question/14805451

3 0
2 years ago
Read 2 more answers
The ratio of income of a person to his savings is 10:1 if his saving for one year is 6000 what is his monthly income
Stells [14]

his monthly income is 60000

5 0
2 years ago
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