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.
In geometry and mathematics, opposing angles are called verticals. They share the same vertex, but they still are vertically opposite of one another.
The angles opposite one another at the intersection of two lines are called vertical angles. Vertical angles are always equal in measure, meaning that if one angle measures 40 degrees, the angle directly opposite it will also measure 40 degrees. This property is a result of the way the lines intersect, creating pairs of angles that are congruent.
Adjacent angles
Complements or complementary events
Vertically opposite angles!
I assume you are asking what such angles are called. The answer is, vertical angles.
In geometry and mathematics, opposing angles are called verticals. They share the same vertex, but they still are vertically opposite of one another.
The word "complements" refers to the suitability of one thing with another. "Compliments", however, are positive comments made by one person to another, usually concerning someones clothes or cooking.
Two lines are crossed by one another line called the transversal. The pairs of angles on opposite sides of the transversal but inside the two lines are called alternative interior angles.
They are said to be perpendicular. Or, if you wanted an example of a pair of such lines, one example is a plus sign.
A decrease in the price of one will increase the demand for the other.
Adjacent angles
Next to one another
products that increase the value of other products / products related in such a way that an increase in the price of one reduces the demand for bolth (found in economics principles & practices from the Texas edition book)
Complements or complementary events
Price of related goods fall into two categories: substitutes and complements. Complements are when a price decrease in one good increases the demand of another good. Substitutes are when a price decrease in one good decreases the demand for another good.
Vertically opposite angles!