## anonymous one year ago Find Each segment length. Tell whether the segments are congruent AB: A(0,2), B(-3,8) CD: C(-2,2), D(0,-4)

• This Question is Open
1. anonymous

what is the formular?

2. anonymous

$d=\sqrt{(x2-x1)^{2} + (y2-y1)^{2}}$

3. anonymous

so to find AB you already know the coordinates so: $AB= \sqrt{(-3-0)^{2}+(8-2)^{2}}$

4. anonymous

$AB=\sqrt{(-3)^{2} +5^{2}}$

5. anonymous

$AB=\sqrt{9+25}$

6. anonymous

$AB=\sqrt{34}$

7. anonymous

You could leave AB = square roof 34 or round it to 5.83

8. anonymous

Do the same to CD: CD= spuare roof of [ (0- (-2) ^2) + (-4-2)^2 ] CD= square roof of [ ( 0+2)^2 + (-6)^2 ] CD= square roof of ( 4 +36) CD = square roof of 40 CD = 2 square roof 10 or 6.32

9. anonymous

congruents or not based on it definition was : exacly the same. Since you know 2 of it leagth, can you said it was congruents or not? 5.83 = 6.32 ( false ) => it NOT CONGRUENT! :)