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Mathematics 22 Online
ILovePuppiesLol:

can someone explain the triangle sum theory, im working on it right now

ILovePuppiesLol:

i need help on some questions

Arcadiouse:

It means, the interior angles of a triangle must equal 180 degrees.

Arcadiouse:

So I can try to help..

undeadknight26:

The sum of the three angles in any triangle sum to 180 degrees. The importance of this fact in Geometry cannot be emphasized enough. The triangle angle sum theorem is used in almost every missing angle problem, in the exterior angle theorem, and in the polygon angle sum formula. Taken from google.

ILovePuppiesLol:

yes i know that

undeadknight26:

What would you like to know about it? How to find the missing side of a triangle? Use the Pythagorean theory.

ILovePuppiesLol:

i know the 180 thing, hold on lemme get a screenshots http://prntscr.com/ckosai

Arcadiouse:

Oh.

Arcadiouse:

Well, add the numbers you have. Then subtract that from 180 and you have X

undeadknight26:

The answer to this is 13 and I'll tell you why.

ILovePuppiesLol:

i thought it was 17

Arcadiouse:

We don't give direct answers here.

undeadknight26:

You are given 77 degrees and you can tell that there is a 90 degrees angle there. Add those to get 167. 180 - 167 = 13.

Arcadiouse:

You are right puppies. I get 17 too.

ILovePuppiesLol:

how can i tell its a 90 degree angle tariq, theres no box that confirms it

Arcadiouse:

Agreed. So you go off of what you know. Not the unknown.

ILovePuppiesLol:

looks slightly less than a 90

undeadknight26:

lol do what ya gotta do m8s.

TheSmartOne:

We know that one angle is 28 We know that the other angle is 58 + 77 The third angle is x The sum of the angles will be 180 28 + 58 + 77 + x = 180 Solve for x

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