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Assume we want to find the ordered pair after 90° counterclockwise rotation. From (x,y), we have (-y,x).
If we want to find the ordered pair after 90° clockwise rotation, then from (x,y) we have (y, -x)
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What is a pair of angles that is 90 degrees?
Complementary angles.
What is a pair of angles that add up to 90 degrees?
They are complementary
What is the rule for a pair of perpendicular lines?
They intersect at 90 degrees
The pair of angle shown sum 90?
Complementary angles add up to 90 degrees.
Do two complimentary angles form a linear pair?
No - a pair of angles totalling 180 degrees are supplementary. Complementary angles sum to 90 degrees.
What is a pair of angles that is 90 degrees?
Complementary angles.
What is the complement of 89 degrees?
The complement of 89 degrees is: 89+1 = 90 degrees which is a complementary angle
What is the rule for a pair of perpendicular lines?
They intersect at 90 degrees
What is a pair of angles that add up to 90 degrees?
They are complementary
The pair of angle shown sum 90?
Complementary angles add up to 90 degrees.
Do two complimentary angles form a linear pair?
No - a pair of angles totalling 180 degrees are supplementary. Complementary angles sum to 90 degrees.
In a complimentary pair of angles both angles must be acute?
A pair of complementary angles add up to equal 90 degrees. Therefore, both angles indeed need to be less than 90 degrees.
What is the name of a pair of angles whose sum equals 90 degrees?
complementary
Which pair of lines is perpendicular?
Lines that intersect at 90 degrees are perpendicular lines
How much greater is the sum of the measures of a pair of supplementary angles than the sum of the measures of a pair of copplementary angles?
Complementary angles add up to 90 degrees and supplementary angles add up to 180 degrees. So the answer is 90 degrees greater.
How can a linear pair have one acute angle and one obtuse angle?
The two angles of a linear pair must add to 180 degrees. So if one is less than 90 degrees (acute) the other must be more than 90 degrees (obtuse).
How to indentify an ordered pair?
An ordered pair has to be in parentheses and there has to be a comma in between the numbers (example: (2,6). An ordered pair is for a coordinate graph.
