## Here_to_Help15 one year ago $$\huge\it\color{#008000}{Help~Please!}$$ ......................................................................

1. anonymous

??? want to where is it

2. Here_to_Help15

one sec

3. Here_to_Help15

$$\huge\it\color{#008000}{Help~Please!}$$

4. UsukiDoll

?!

5. Here_to_Help15

6. mathstudent55

This uses the Right Triangle Altitude theorem.

7. Here_to_Help15

I dont know that one ;/

8. mathstudent55

The Right Triangle Altitude Theorem In a right triangle, if the altitude is drawn to the hypotenuse, the three triangles are similar and the lengths of the corresponding sides are in proportion.

9. Here_to_Help15

hmm ok

10. mathstudent55

11. Here_to_Help15

ok

12. mathstudent55

Now draw the altitude to the hypotenuse. |dw:1434341065801:dw|

13. mathstudent55

|dw:1434341115298:dw|

14. mathstudent55

Triangles ABC, CBD, and ACD are similar.

15. mathstudent55

From similarity of triangles, you get the lengths of corresponing sides are in proportion.

16. Here_to_Help15

Sorry @mathstudent55 can we continue this tomorrow?

17. Here_to_Help15

Something important has came up

18. mathstudent55

$$\dfrac{c}{a} = \dfrac{a}{d} = \dfrac{b}{f}$$

19. mathstudent55

ok