a straight line
Chat with our AI personalities
SUPPLEMENTARY ANGLES are two angles the sum of whose measures is 180 degrees.
Supplementary angles add up to 180 degrees
When two angles add up to 180 degrees, they are supplementary to each other.
The angle subtended (on) a straight line is 180°. Two such angles = 2 x 180 = 360°.
Supplementary angles add up to 180 degrees