McGraw Hill Glencoe Geometry, 2012
MH
McGraw Hill Glencoe Geometry, 2012 View details
Get Ready for the Chapter
Continue to next subchapter

Exercise 5 Page 391

Let's begin with recalling that a linear pair is a pair of adjacent angles with non-common opposite sides.

Remember that the measures of these two angles always have a sum of as together they create a straight angle. Now, let's look at the given picture.

As we can see, and form a linear pair. Therefore, we can write that the sum of the measures of these angles is equal to