distance between two points

the coordinates of points A and B are (-7,5) and (4,-3) respectively. what is the distance between the points.
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To find the distance between two points we use Pythagoras' theorem, and use the x and y coords to form a right-angled triangle, where the hypotenuse is the distance between the points. The distance between the x coords is 4-(-7)=11 and 5-(-3)=8 between the y coords. The hypotenuse is sqrt(11^2+8^2)=sqrt(121+64)=sqrt(185)=13.60 approx.

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