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Glad to see that we both were clarified.
You're welcome. I have learnt something too.
Yes, so it is congruent because it coincides. Thankyou both.
Thanks. And that uses SAS (axiomatic) to prove the others. Hhhhmm!
Check this out.
Prove 'perpendicular'.
Well if we have a perpendicular bisector as the diagonal, then by SAS we can see that they are congruent.
Why does it prove that?
Oh okay then. So because the sides and angles coincide (ABC and DEF) making them congruent, that would be a valid proof for SideAngleSide? Anyways, thankyou both.
thanks Stefy
For example, to prove SideSideSide, using SideAngleSide, we just make two triangles such that they make a kite (being diagonal). That proves that the triangles are congruent.
My difficulty is I have never seen any proved so I'm not sure where to start. That's why I need to see one that you have already done. Then I can see what you are after.
I have found this: http://www.proofwiki.org/wiki/Triangle_ … ity#Part_1.
My difficulty is I have never seen any proved so I'm not sure where to start. That's why I need to see one that you have already done. Then I can see what you are after.
Well isn't SAS just an axiom? How do you prove that: If 2 sides and angles in a triangle are congruent to two sides and angles of another triangle, the triangles are congruent. Like take 2 triangles: ABC, DEF. If AB=DE, AC=DF and angle A = angle D, the triangles ABC and DEF are congruent. 