What are the steps to a proof problem that asks you to prove that each angle in an equiangular triangle is 60 degrees?
Well the sum of the angles of a triangle are 180 degrees. An equiangular triangle is a triangle with all equal angles. 180/3=60

There ya go. Maybe you can word that better though.
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what's the conjecture/postulate that says triangles are 180 degrees in sum?
*Shrug* Look it up? I have in my head but I forget what it's called.
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I think i got it...
Given tri. ABC, prove m<A = 60
m<A + m<B + m<C = 180 by triangle sum conjecture
m<A = 60 by 180/3???
m<A = m<B = m<C = 60 by substitution
Mention the triangle is equiangular.
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That is priceless man, you might be my new idol.

Just had to get that out there.

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I think I'd flip steps 2 and 3 around and say that m<A = m<B = m<C by the definition of an equilateral triangle, and therefore m<A = 60.
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what's the conjecture/postulate that says triangles are 180 degrees in sum?

definition of a triangle
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i equiangular the same as equilateral?

Equiangular means all the angles are the same. Equilateral means all the sides are the same. In a triangle, one follows from the other, so yes.
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Lol thanks guys, i think i got it although
im not too sure on the 180/3 step...

can it be more formal?
wow. i dont understand any of this.
lol I'm sorry but I just find that funny with your user name.
Alright...

Given: tri. ABC is equiangular.
Prove: m<A=60

m<A = m<B = m<C because the triangle is equiangular
The sum of the angles of a triangle are 180 degrees, by Definition of a Triangle.
m<B = 60 degrees, 180/3 = 60
m<A = 60 degrees by transitive property.

That could work.
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That is priceless man, you might be my new idol.

Just had to get that out there.

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Can we hurry this up? I'm exhausted! Hahaha.
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That is priceless man, you might be my new idol.

Just had to get that out there.

We're ticking away, the moments that make up the dull days
its easy.

proofs are very straight forward, and a lot of people are scared to write stuff because of that.

just say:

triangle is equiangular - (given)
<a + <b + <c = 180 (angles of a triangle = 180 degrees)
180/3 = 60 degrees

therefore <a = 60 deg., <b = 60 deg., <c = 60 deg.

thats a good enough proof of a question like that
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Last edited by instagata0 at Nov 7, 2007,