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I am trying to fine AU. And Angle ARU. I think i have what i need for AU. Just need some confirmation.

...Am i right on that?

yes, AU is 20, but how did u prove it ?

else reasoning is correct

Ok! And how should i figure out what the measure of angle ARU is? I am stuck there.

thats even simpler, AR bisects angle R

OH!!! SO then 40 degrees?

yup :)

Yuuuss thanks!!

welcome ^_^