Question

A triangle can be formed with side lengths 3 in, 5 in, and 9 in.

True
False

Answer 1

A triangle with sides a,b,c is only possible if all of the following are true

a+b > c
a+c > b
b+c > a

Answer 2

Okay thanks

Answer 3

So basically it's false

Answer 4

why is it false?

Answer 5

Because all of the sides aren't the same?

Answer 6

no that's not the reason why

Answer 7

a = 3
b = 5
c = 9

is a+b > c true?

Answer 8

Yes

Answer 9

you sure?

Answer 10

Wait

Answer 11

No

Answer 12

you should end up with 8 > 9 which is false

Answer 13

Ok

Answer 14

this is the triangle inequality theorem

http://www.regentsprep.org/regents/math/geometry/GP7/LTriIneq.htm

Answer 15

Ok So false right?

Answer 16

yeah because the two sides (5 and 3) aren't long enough to be able to fit the other side (9)

Answer 17

we have something like this maybe

Answer 18

Okay thanks so much I wouldn't of know that if it wasn't for you!!! c:

Answer 19

you're welcome