Question

What is the perimeter of a triangle with corners at `(1 ,9 )`, `(5 , 2 )`, and `(9 ,4 )`?

Answer 1

`sqrt65 +sqrt 89 +sqrt20` =21.9683

Explanation:

Distance between (1,9) and (5,2) would be = `sqrt((5-1)^2 +(2-9)^2) = sqrt 65`

Distance between (1,9) and (9,4) would be =`sqrt((9-1)^2 +(4-9)^2)=sqrt89`

Distance between (5,2) and (9,4) would be= `sqrt ((9-5)^2 +(4-2)^2))= sqrt 20`

Perimeter would be `sqrt65 +sqrt 89 +sqrt20` =21.9683