Name a pair of vertical angles (easy question)
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The possible ordered pairs whose product will be negative (less than zero) are,
That is all these products will give us,
The point must be in the second quadrant where x is negative and y is positive.
Or in the fourth quadrant, where y is negative and x is positive.
That is all these products will give us,
The point must be in the second quadrant where x is negative and y is positive.
Or in the fourth quadrant, where y is negative and x is positive.