Question

proving an isosceles triangle? please help! info in the comments

Answer 1

Please help!

Answer 2

i posted a picture, do you see it?

Answer 3

Is this all the info given?

Answer 4

WOW, I saw your final statement and said to my self what about,

Answer 5

http://www.mathwarehouse.com/geometry/congruent_triangles/isosceles-triangle-theorems-proofs.php try this website

Answer 6

@josh117, do you realize why your final statement, (that those are right triangles) makes no sense as a proof?

Answer 7

(that those are right angles) not triangles (sorry)

Answer 8

sorry I forgot to include the given

Answer 9

then yes, because isosceles and bisects the line tells us they are right angles.

Answer 10

2 common proof, or essay?

Answer 11

im suppose to write a formal proof with statement, so a 2 column proof. Im sorry to keep forgetting to to add all he info

Answer 12

it's okay.

Answer 13

Do you know how to start it?

Answer 14

I have a rough idea, but i dont know if im doing it right.

Answer 15

Well, the form is supposed to be

Answer 16

you would usually start from the given (or an identity)

Answer 17

Can you post your info inside the thread please, it's really hard for me to refer back to another window every time

Answer 18

i had it in that form, and do you mean my eamil?

Answer 19

email*

Answer 20

you can copy the info into the thread, that's what I was asking you to (please) do.

Answer 21

Statement Reason

Triangle ADB is congruent to triangle ADC Side Angle Side

Side BD is congrunet to side CD CPCTC

Answer 22

you have to prove what?