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Mathematics 22 Online
OpenStudy (winsteria):

MEDAL AND FAN The triangles shown are similar. What is the value of x? http://oi59.tinypic.com/14l61io.jpg A) 20 B) 13 C) 15 D) 12

OpenStudy (winsteria):

@Nnesha

OpenStudy (anonymous):

C) 15

OpenStudy (anonymous):

He is right Pythagorean theorem a2+b2=c2

OpenStudy (winsteria):

Thank you

OpenStudy (aaronandyson):

http://prntscr.com/64olnx Hint: Evey side og the `bigger triangle` is `3 times than that of the smaller one`

OpenStudy (aaronandyson):

OR

OpenStudy (aaronandyson):

Use the `Pythagorean theorem `

OpenStudy (aaronandyson):

A^2 = B ^2 + C^2

OpenStudy (aaronandyson):

A = to be calculated B = 9 C - 12 Square the given values and add them i.e 9^2 + 12^2

OpenStudy (aaronandyson):

9^2 = 9 times 9 12^2 = 12 times 12

OpenStudy (aaronandyson):

so now whats 9 times 9 plus 12 times 12?

OpenStudy (aaronandyson):

81 + 144

OpenStudy (aaronandyson):

which is 225

OpenStudy (aaronandyson):

A^2 = 225 therefore `square root of 225 is A`

OpenStudy (aaronandyson):

15 times 15 is 225

OpenStudy (aaronandyson):

Hence, the answer is, ` C) 15`

OpenStudy (winsteria):

Thank you

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