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Mathematics 19 Online
OpenStudy (anonymous):

help

OpenStudy (anonymous):

OpenStudy (danjs):

(side)^2 + (side)^2 = (hypotenuse)^2

OpenStudy (anonymous):

I have this question and one more then I'm done, I just need to know how to do these lol.

OpenStudy (danjs):

That is the pythagorean theorem for right triangles sum of the squares of the two sides = hypotenuse squared

OpenStudy (anonymous):

15^2 + 20^2?

OpenStudy (danjs):

yes = (AB)^2

OpenStudy (danjs):

so AB = square root (15^2+20^2)

OpenStudy (anonymous):

25?

OpenStudy (danjs):

\[a^2 + b^2 = c^2\] \[c = \sqrt{a^2 + b^2}\]

OpenStudy (danjs):

yep

OpenStudy (anonymous):

Yayyyyy lol :)

OpenStudy (anonymous):

OpenStudy (anonymous):

Same thing with this one?

OpenStudy (danjs):

kind of

OpenStudy (danjs):

\[30^2 = 24^2 + BC^2\]

OpenStudy (danjs):

need to subtract this time instead

OpenStudy (danjs):

they gave you the hypotenuse and a leg length, instead of both leg lengths

OpenStudy (danjs):

\[BC = \sqrt{30^2-24^2}\]

OpenStudy (anonymous):

18 cm? I got that by putting 18 squared + 24 squared = 30 squared. 30 squared is 900

OpenStudy (danjs):

right

OpenStudy (anonymous):

Thank you so much for helping me Dan :)

OpenStudy (danjs):

you're welcome

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