Posted by **properties of triangle** on Friday, January 28, 2011 at 12:36am.

the exterior angle 120degre and one interior angle 45degre of each triangle are given.find the other interior opposite angle and the third angle of each triangle.

- geometry -
**drwls**, Friday, January 28, 2011 at 12:45am
The interior angle associated with the 120 degree exterior angle is its supplement: 60 degrees. With interior angles of 45 and 60 degrees, the third interior angle must be 180 - 105 = 75 degrees

- geometry -
**helper**, Friday, January 28, 2011 at 12:45am
See your first post.

- geometry -
**helper**, Friday, January 28, 2011 at 12:47am
Thanks drwls. I could not understand this post at all. :)

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