An acute angle
abtouse
The supplement of an 80 degree angle is an 100 degree angle.
acute
20
80 degree
20 degrees
20 degrees.
20 degree.
It is an isosceles triangle because the third angle must measure 50 degrees
180-100=80 degree angle
a 10-degree angle
The compliment of a 100 degree angle is a 80 degree angle.