Finding Missing Angle Measures

A triangle has angle measures of 75º and 85º. A quadrilateral has angle measures of 105º, 65º, and 50º. What are the missing angle measures for the triangle and the quadrilateral? Describe the process you were able to use to find these missing angle measures.
on  April 18, 2008  at  10:54 AM

The angle missing for the triangle is angle 3 20° the angle missing for the quadrilateral is 135°, I found this ou
on  April 18, 2008  at  10:55 AM

Mr.Bosch,
personally, I think this stuff is confusing (but I am willing to try)
I think I am lost and my process i just add and subtract like you did on the board.if i am right the answer would be 85 deegrees
-mallory

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