Question

(Geometry) Explain the distance formula. Then use it to calculate the distance between A(1,1) and B(7,-7).

Answer 1

is this right?

Explanation:

Answer 2

A(1,1) B(7,-7)
d= \sqrt{ (7 - 1) ^{2}+ (-7 -1) ^{2} }
d= \sqrt{ (6) ^{2}+ (-8) ^{2} }
d= \sqrt{ 36 + 64 }
d= \sqrt{ 100 }
d=10