Question

GEOMETRY: TRIGONOMETRIC RATIOS

Which of the following equations correctly represents the distance between points (1,-1) and (-2,2)

Answer 1

Option 2

Explanation:

Recall the distance formula:

`√((x^1-x^2)+(y^1-y^2))`

(note that this formula can be switched around. x^1 and x^2 can be switched and y^1 and y^2 can be switched and you could put the y's parentheses in front of the x's parentheses)

If we insert our numbers into our question we can see that they match option 2. (remember, two negatives make a positive)

Therefore, the answer is option 2.