## emily9102 Group Title help please one year ago one year ago

1. emily9102 Group Title

2. Jusaquikie Group Title

so here is what we have:|dw:1351376665576:dw|

3. Jusaquikie Group Title

what we want to do is make a triangle out of that and use the Pythagorean theorem ($A^{2} +B^{2} = C^{2}$)

4. emily9102 Group Title

ok, writing as you type :)

5. Jusaquikie Group Title

|dw:1351376894963:dw|

6. Jusaquikie Group Title

so A(5+10) B(4+3) is $15^{2}+8^{2}= 225+64= \sqrt{289} = 17$

7. Jusaquikie Group Title

that gives the diameter which is 2r so the radius is 8.5

8. Jusaquikie Group Title

wait it's 7 not 8 lol

9. emily9102 Group Title

7.5 or just 7?

10. Jusaquikie Group Title

so that changes it to 225+49 =274

11. Jusaquikie Group Title

the square root of that is 16.55 divided by 2 is 8.276

12. emily9102 Group Title

so 8.3?

13. Jusaquikie Group Title

do you see where the numbers come from?

14. emily9102 Group Title

yes i was just checking. trying to write fast lol

15. Jusaquikie Group Title

it would have been neater if i didn't use 8 on the clean example lol

16. emily9102 Group Title

lol yes lots of scratch now haha. so just to be sure its 8.3?

17. Jusaquikie Group Title

yes that is what it rounds to