Page 70 Questions

Page 70 #1:

  The difference between complementary and supplementary angles, is the fact that when 2 angles are complementary, their measurements will always add up to 90 degrees. When 2 angles are supplementary, their measurements will always add up to 180 degrees.
  I will remember the difference between the two, because this lesson clicked for me. I don't need any special way to depict the two, complementary means 90 to me, and supplementary means 180 to me.
  I learned that 2 angles that share the same complementary angle, are congruent. <4 + <5= 90 and
<5 + <6= 90. So <4 is congruent to <6.