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Mathematics 12 Online
OpenStudy (sbuck98):

First person to solve gets medal, fan, and help in another subject of your choice.

OpenStudy (sbuck98):

OpenStudy (anonymous):

Use the pythagorean theorem.

OpenStudy (anonymous):

51 would have to be hypotenuse, because it is the largest side.

OpenStudy (anonymous):

So check if \[ 51^2=45^2+24^2 \]is a false statement or not.

OpenStudy (sbuck98):

It's a true statement. @wio

OpenStudy (junhaoz):

so it's a right triangle

OpenStudy (anonymous):

If it is true, then they form a right triangle.

OpenStudy (sbuck98):

So ,my reason is because the the statement is true it's a right triangle? @wio

OpenStudy (junhaoz):

but it's not a special right triangle, which question asked for

OpenStudy (anonymous):

You can use the law of cosigns to show that the only triangle it can be is a right triangle.

OpenStudy (sbuck98):

Could you further explain why it's not a special right triangle? I don't really know much about triangles at all.

OpenStudy (anonymous):

Oh wait, special right triangle? Let me look again.

OpenStudy (junhaoz):

The 2 types of special triangle are 45-45-90 and 30-60-90, and the sides have to have ratio of 1:1:2 or 1:2:root3, but none of them qualify

OpenStudy (anonymous):

If it is a special right triangle, then one of the sides must be half the hypotenuse, so either:\[ 2\times 45 = 51 \quad\text{or}\quad 2\times 24=51 \]If both statements are false, it is not a special right triangle.

OpenStudy (anonymous):

Hmm, well that is for 30-60-90 For 45-45-90 we would need the non-hypotenuse sides to be equal:\[ 45=24 \]

OpenStudy (sbuck98):

They're both false. Thank you. Could you both help me with a few more problems until I get the hang of this because I still can't do this on my own @wio @JunhaoZ

OpenStudy (junhaoz):

ok sure

OpenStudy (sbuck98):

OpenStudy (junhaoz):

first of all it doesn't resemble a right triangle because 20^2+25^2=30^2 is false, and second, when you simplify all three numbers, you will get 4,5,6, and that's not a Pythagorean triplet.

OpenStudy (sbuck98):

Okay, thank you, could you help me with 4 more? @JunhaoZ

OpenStudy (junhaoz):

I'll try

OpenStudy (sbuck98):

OpenStudy (junhaoz):

The ratio of the legs of a 30-60-90 right triangle is (short:long:hyp) 1:root3:2, so if 12.5 in is 1, then the hypotenuse would be double that, 25.

OpenStudy (junhaoz):

But the long side is a bit tricky. You multiply 12.5 with root3, which is about 21.65 in

OpenStudy (junhaoz):

any other questions?

OpenStudy (sbuck98):

Yes, 3 more.

OpenStudy (sbuck98):

OpenStudy (sbuck98):

@JunhaoZ

OpenStudy (junhaoz):

The short side is 22/2=11cm, and the long side would be about 19.05cm

OpenStudy (sbuck98):

Could you explain why/ how? @JunhaoZ

OpenStudy (junhaoz):

well, the ratio is 1:root3:2, and 22 is the 2 in the ratio, the short side is half of it, so 11. The long side is root3 times the short side, and 11 times root3 is about 19.05cm

OpenStudy (sbuck98):

Thank you, I only need help with two more.

OpenStudy (snuggielad):

Awesome job helping guys!

OpenStudy (snuggielad):

You need to open a fresh question for more help @sbuck98

OpenStudy (junhaoz):

No strong languages please

OpenStudy (sbuck98):

*Help

OpenStudy (junhaoz):

oh

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