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Mathematics 20 Online
OpenStudy (baby456):

Use the pythangoream therom to answers these questions! For a medal and fan! A^2+b^2=c^2

OpenStudy (baby456):

|dw:1403132683921:dw|

OpenStudy (baby456):

|dw:1403132725518:dw|

OpenStudy (baby456):

@jim_thompson5910

OpenStudy (baby456):

@precal

OpenStudy (baby456):

@zepdrix

zepdrix (zepdrix):

\[\Large\rm \color{royalblue}{a=5},\qquad\qquad \color{orangered}{b=12}\] \[\Large\rm \color{royalblue}{a}^2+\color{orangered}{b}^2=c^2\]\[\Large\rm \color{royalblue}{5}^2+\color{orangered}{12}^2=c^2\]Solve for c! :) Square the stuff, add it up, then square root each side.

OpenStudy (baby456):

I am so confused!

OpenStudy (baby456):

i got 25+144=169^2

OpenStudy (sweetburger):

no no it should be 25+144=13^2

OpenStudy (baby456):

i forgot to square it

OpenStudy (baby456):

so i get 25+144=169

zepdrix (zepdrix):

Good. so \(\Large\rm 169=c^2\)

OpenStudy (baby456):

ok i get it how about the secound one!

zepdrix (zepdrix):

\[\Large\rm \color{royalblue}{5}^2+\color{orangered}{12}^2=c^2\]\[\Large\rm 25+144=c^2\]\[\Large\rm 169=c^2\]\[\Large\rm ?=c\]

zepdrix (zepdrix):

Got it? Ok good :) Hmm is the second one a right triangle?

zepdrix (zepdrix):

@sweetburger is that Nicholas Cage on that bunny? 0_o

OpenStudy (baby456):

yeah! sorry i couldn't shape it!

zepdrix (zepdrix):

|dw:1403133478198:dw|The longest side of the triangle is always our C. So that means the 14 is our c value.

zepdrix (zepdrix):

\[\Large\rm \color{orangered}{b=11},\qquad\qquad \color{green}{c=14}\] \[\Large\rm a^2+\color{orangered}{b}^2=\color{green}{c}^2\]\[\Large\rm a^2+\color{orangered}{11}^2=\color{green}{14}^2\]This one requires just a little bit more work to solve.

OpenStudy (baby456):

so i got a^2+121=196

zepdrix (zepdrix):

Mmmmmk good! So how do we get a^2 alone? Gotta deal with that 121.

OpenStudy (baby456):

subtract!

zepdrix (zepdrix):

cool c:

OpenStudy (baby456):

a^2=75

zepdrix (zepdrix):

\[\Large\rm a^2=75\]\[\Large\rm a=?\]k good, what's your last step then? :o

OpenStudy (baby456):

75 squatred is

zepdrix (zepdrix):

squatred? XD

zepdrix (zepdrix):

that sounds spanish

OpenStudy (baby456):

squared

OpenStudy (baby456):

is it 9

zepdrix (zepdrix):

Not squared. Square root.

OpenStudy (baby456):

8.66025403784

zepdrix (zepdrix):

ya c:

OpenStudy (baby456):

thats what on my caculator!

OpenStudy (baby456):

so its 8.66

OpenStudy (baby456):

so could you help me with one more problem!

zepdrix (zepdrix):

Yes 8.66. But if they want an exact answer, you would leave it as \(\Large\rm \sqrt{75}\) or simplify it to \(\Large\rm 5\sqrt3\)

zepdrix (zepdrix):

sure

OpenStudy (baby456):

ok find the area and perimeter for the figure below!

OpenStudy (baby456):

|dw:1403134160330:dw|

zepdrix (zepdrix):

|dw:1403134244479:dw|Let's label all of the sides.

zepdrix (zepdrix):

Perimeter is the distance around the object. So we just add up all of the side lengths.

zepdrix (zepdrix):

\[\Large\rm 3x+3x+~x+2~+~x+2~\]Combine like-terms.

OpenStudy (baby456):

6x^2+x+4

zepdrix (zepdrix):

No no no silly.

zepdrix (zepdrix):

|dw:1403134394382:dw|

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