## Mrfootballman97 2 years ago Can anyone please help me understand how to do this problem? I will give medals and become fans if you do.

1. Mrfootballman97

|dw:1358735725040:dw|

2. Mrfootballman97

Given: Angle ACB is a right angle; D, E, and F are the midpoints of Seg. AB, BC, and CA. Find CD, EF, ED. Please help me understand how to do this

3. zordoloom

|dw:1358736371026:dw|

4. Mrfootballman97

What is the law of sines? How do i find EF and CD?

5. zordoloom

Sorry, I didn't realize you don't know trig. In this case, use the Pythagorean theorm

6. zordoloom

|dw:1358736683020:dw|

7. zordoloom

So, Side ED is 5 units long

8. zordoloom

FE would be 13.

9. zordoloom

and DC would be 13

10. zordoloom

Or, you could have used proportions. Since every triangle is the midpoint of another.

11. Mrfootballman97

Thanks Man! Now how would i find out this problem: If the measureof angle B is 23, find the measure of angle DCB

12. zordoloom

|dw:1358736914508:dw|

13. Mrfootballman97

I just need to find the measure of angle DCB

14. zordoloom

From what triangle?

15. Mrfootballman97

CDB

16. zordoloom

That angle would be 22.89

17. zordoloom

But since you don't know trig, I don't know how to explain this to you using any ordinary method.

18. Mrfootballman97

Ok. Well thanks man you saved me tonight.