<h3>Answer: 22 units</h3>
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Explanation:
You can use the distance formula

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A shorter method is to subtract the y coordinates and apply absolute value
So either |-4-18| = |-22| = 22
Or, |18 - (-4)| = |18+4| = |22| = 22
This method only works because the x coordinates are the same. We can also use this method if the y coordinates were the same with the x coordinates being different.
Answer:
Coordinate A would be (12,3)
Coordinate B would be (12,7)
Coordinate C would be (10,5)
You just cross multiply and then simplify
The answer you are looking for is an obtuse so it would be more than 90 degrees. may i have brainlest