distance betweeen 2 points, (x1,y1) and (x2,y2) is D=√[(x2-x1)²+(y1-y1)²]
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given
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(4,8) and (0,5), x1=4, y1=8, x2=0, y2=5
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D=√[(0-4)²+(5-8)²]
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D=√[(-4)²+(-3)²]
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D=√[16+9]
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D=√25
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D=5
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the distance between the point is 5 units
