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Mathematics 7 Online
OpenStudy (anonymous):

please help guys!!! If x = 48 cm and y = 55 cm, what is the length of w?

OpenStudy (anonymous):

OpenStudy (anonymous):

A 73 cm B 103 cm C 77 cm

OpenStudy (anonymous):

@sajjadahmed

OpenStudy (anonymous):

im not so good at geometry

OpenStudy (whpalmer4):

Use the Pythagorean theorem, as this is a right triangle. The sum of the squares of the shorter two legs will equal the square of the length of the longest leg (which is called the hypotenuse). \[x^2+y^2=w^2\]

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

yea hes right!

OpenStudy (anonymous):

a^2 + b^2 = c^2

OpenStudy (anonymous):

I know its either a or c

OpenStudy (whpalmer4):

There's no need to guess, you can figure it out exactly and be confident that your answer is correct.

OpenStudy (anonymous):

so 48^2+55^2=w^2 2304+3025 5329 and then square root tht 73 A

OpenStudy (anonymous):

yea hes righ toy u probably should try dong i yourself...

OpenStudy (whpalmer4):

It is good to know that B couldn't be an answer, however, because 48+55 = 103, and that would mean our triangle had no interior! The two sides added together should be greater than the length of the hypotenuse...

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