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 sum of the angles in a trapezoid is 360 degrees, therefore, the forth angle in this problem is: 360 - (60+120+80) = 100 degrees
The supplement of an 80 degree angle is an 100 degree angle.
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