What is the length of missing side b in the figure below?
https://my.pennfoster.com/exams/images/00702400Q17.jpg

- jakyfraze

- katieb

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- jakyfraze

##### 1 Attachment

- jakyfraze

@triciaal please help me with this question

- triciaal

pythagorean theorem
7^2 + b^2 = 13^2

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## More answers

- triciaal

b^2 = 169- 49 =
b = square root of b^2

- triciaal

what did you get?

- jakyfraze

I'm sorry, i really don't understand this at all :(

- triciaal

you are not reading

- triciaal

now that you have read the response what is b?

- jakyfraze

why 169 - 49?

- jakyfraze

i got 218 :(

- jakyfraze

@triciaal i try solving it and i got 218 :(

- jakyfraze

@triciaal and i got 2cm. am i doing something wrong? please help me

- triciaal

what is 169 take away 49
169 minus 49 =
169 - 49 =

- jakyfraze

120

- triciaal

so b^2 = 120
to get b take the square root

- jakyfraze

@triciaal I'm sorry what do you mean?

- jakyfraze

take the square root?

- triciaal

I hope you see the importance of reading and following directions

- jakyfraze

so it's 2cm?

- jakyfraze

i I'm reading the direction. it's just i don't understand

- triciaal

are you mixing questions or something?
how on earth do you get 2cm not even an option

- triciaal

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- triciaal

where are you stuck?

- jakyfraze

i got 2cm because of this

- jakyfraze

##### 1 Attachment

- jakyfraze

@triciaal i got 120 but you said so b^2 = 120
to get b take the square root. so i got lost :( sorry

- triciaal

that example is showing how to use pythagorean theorem
in that example the sides are 3 and 4 so the missing length was the hypotenuse 5 cm
in your problem you have the hypotenuse and one leg so you subtract to find the other leg

- triciaal

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- triciaal

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- triciaal

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- triciaal

think of square root as the opposite operation to square just like addition with subtraction and multiplication with division

- jakyfraze

what was the last bottom part of the picture?

- triciaal

are you understanding now?

- jakyfraze

a little bit, please don't get mad I'm now learning this

- triciaal

had computer problems guess that was a sign not to post what I wrote
bottom line is I don't get mad when a person needs time. I am extremely patient. I don't appreciate people who say " i don't understand" when they are not trying or reading.

- jakyfraze

@triciaal is it B. 120

- triciaal

square root of 120 yes

- triciaal

to review
do you understand pythagorean theorem?
do you understand the operations square and square root?
do you have any other questions?

- jakyfraze

@triciaal thank you. were can i go to learn this more. do you know any websites i can go to?

- triciaal

sorry I don't know the best sites (I learnt this before the computer age) but khan academy and yah math have helpful videos.

- triciaal

Math is fun. I think the key is to practice problems so you know the steps to follow and how to identify different theorems etc.

- jakyfraze

@triciaal thank you so much for your help :)

- triciaal

you are welcome. all the best with your studies.

- jakyfraze

Thank you

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