true
acute
They are complements when they add to 90 degrees, making a right angle. For example 60 degrees and 30 degrees, or 23 degrees and 67 degrees.
18 degrees
90 - 30 = 60 degrees.
3
not always but sometimes there is a few.
6 subsitutes
complements
Complements can be divided into two main types: subject complements and object complements. Subject complements follow a linking verb and provide additional information about the subject. Object complements follow a direct object and provide additional information about the object.
C====3
Thymine complements adenine.
Complements are defined for angles, not trigonometric ratios of angles.
Complements the human body's best posture and functionality
Light.
congruent
Regards