100
180-100=80 degree angle
An 80 degree angle is an acute angle. Any angle measurement that falls below 90 is acute while anything above is obtuse.
The supplement of an 80 degree angle is an 100 degree angle.
The sum of the angles in a trapezoid is 360 degrees, therefore, the forth angle in this problem is: 360 - (60+120+80) = 100 degrees
a 10-degree angle
The compliment of a 100 degree angle is a 80 degree angle.
complementary angles are defined as 90 degrees - the given angle so 90-80=10 10 degree angle is complementary to an 80 degree angle
An acute angle
An 80 degree angle is an acute angle because it is greater than 0 but less than 90 degrees.
Angles can be complementary. A 100 degree angle is a complementary angle to an 80 degree angle in geometry studies.
With a protractor.
100 degrees