The distance from AB = BC. AB = x^2 and BC = 9. Find AC.

[mathdad]

Find Distance AC.

The distance from AB = BC. AB = x^2 and BC = 9. Find AC.

My Work:

A------x^2------B-----9----C

sqrt{x^2} = sqrt{9}

x = 3

Then x^2 = 3^2 = 9

If AB = 9 and BC = 9, then we add AB + BC to get the entire distance. This is basic geometry.

AC = 18

Correct?

 

[Greg]

If AB = BC and BC = 9 then AB = 9. AB + BC = AC = 9 + 9 = 18.

 

[mathdad]

If AB = BC and BC = 9 then AB = 9. AB + BC = AC = 9 + 9 = 18.

It feels good to be right.

 

[Greg]

That is assuming AC is a straight line, of course. If not, how do we answer?