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Mathematics 11 Online
OpenStudy (anonymous):

Find the length of DB.

OpenStudy (anonymous):

OpenStudy (anonymous):

can you help me?

OpenStudy (anonymous):

pythagorean theorem 25^2-17^2=x

OpenStudy (anonymous):

yeah..

OpenStudy (anonymous):

about that...

OpenStudy (anonymous):

it does not work for this problem

OpenStudy (anonymous):

8 10 12 15 20

OpenStudy (anonymous):

these could all be possible lengths for DB

OpenStudy (anonymous):

any suggestions?

OpenStudy (anonymous):

the bisector doesn't equal 17?

OpenStudy (anonymous):

it does...

OpenStudy (anonymous):

AD is 17

OpenStudy (anonymous):

AC is 15

OpenStudy (anonymous):

I think CD is 8

OpenStudy (anonymous):

AB is 25

OpenStudy (anonymous):

so DB is?

OpenStudy (anonymous):

oh sorry it's not a right triangle. Give me a second.

OpenStudy (anonymous):

ty

OpenStudy (anonymous):

It's 12

OpenStudy (anonymous):

you still there?

OpenStudy (anonymous):

you use pythagorean theorem to find the missing side of the big right triangle 20 and then the smaller right triangle 8 and then 20-8=12

OpenStudy (anonymous):

wah

OpenStudy (anonymous):

where did you get 20 from?

OpenStudy (anonymous):

20 is what u get as the missing side of abc

OpenStudy (anonymous):

25 squared - 15 squared?

OpenStudy (anonymous):

equals 20 squared=20?

OpenStudy (anonymous):

yes exactly

OpenStudy (anonymous):

and then 12 was found

OpenStudy (anonymous):

because the missing side of acd is 8

OpenStudy (anonymous):

ahh

OpenStudy (anonymous):

k

OpenStudy (anonymous):

ummm

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