The distance between two points (x1,y1) and (x2,y2) is (x2−x1)2+(y2−y1)2. Using this distance formula we obtain:
1.a. The distance between (3,4) and (5,2) is (5−3)2+(2−4)2=4+4=8=22.
b. The distance between (0,6) and (4,0) is 42+62=16+36=52=213.
2. The distance between the points (b,3) and (−b,2) is (−b−b)2+(2−3)2=4b2+1.
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