SOLUTION: Given: In triangle ABC, angle B = 120 Proven: angel A (equal sign with a line through it) 60 degrees Plan: Use an indirect poof. (write the proof using the paragraph meth

Question 111468: Given: In triangle ABC, angle B = 120
Proven: angel A (equal sign with a line through it) 60 degrees
Plan: Use an indirect poof.
(write the proof using the paragraph method) I am totally lost here, could someone help me? That�s my problem with algebra; it all looks like Chinese to me. lol

Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!

Given: In triangle ABC, angle
Proven: angel A is not equal to

If you use an indirect proof, you need to assume what you need

, and then show that something contradictory (absurd) happens.
You will need following steps:
Assume that the of what you are trying to prove is true; in
other words, assume that angle is

as we know,

of
a triangle is equal to degrees.

you can solve for

.....it is to have one of three angles in a
triangle equal to

So, you can conclude that, as it was proven, angel is not equal to

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