Since angles ABC and DEF are complementary, we know that the sum of their measures is 90 degrees.
m<DEF + m<ABC = 90 degrees
71.8 + m<ABC = 90
m<ABC = 90 - 71.8
m<ABC = 18.2
Therefore, the measure of angle ABC is 18.2 degrees.
Angles ABC and DEF are complementary. If m<DEF is 71.8 degrees, what is m<ABC?
1 answer