Question

Seth is proving that the sum of the interior angles of a triangle is one hundred eighty degrees. Which statement will be necessary as part of the proof?

Answer 1

@RyleeC

Answer 2

Are there answer choices?

Answer 3

you need to show that 1 + 2 + 3 is 180 degrees

Answer 4

yes there are

Answer 5

and 4 + 5 is 180 degrees

Answer 6

and 6 + 7 is 180

Answer 7

Take an equilateral triangle for example (all sides are equal in size). It has angles within itself that are all 60 degrees. 60 x 3 is 180.

Answer 8

this means that angle 5 = 6

Answer 9

the triangle is not equalateral

Answer 10

And in this case, you do have an equilateral triangle.

Answer 11

measure of angle one plus measure of angle two plus measure of angle three equals one hundred eighty degrees

measure of angle one plus measure of angle two equals measure of angle two plus measure of angle three

measure of angle five plus measure of angle six equals measure of angle four plus measure of angle seven

measure of angle five equals measure of angle six and measure of angle four equals measure of angle seven

Answer 12

you cannot theoretically prove its a equilateral, only a isoceles

Answer 13

All of it's sides are the same size and angle.

Answer 14

no

Answer 15

so much knowledge

Answer 16

it looks like it yes, but theoretically you cant prove it, that's why we use proofs

Answer 17

i posted the answer choices up there

Answer 18

Adding angle 2 5 and 6 gives you 180 degrees.

Answer 19

so wait would the answer me m<f=m<6 and m<4=m<7 ?

Answer 20

I say D.

Answer 21

I know its kind of crappy, but this is an equilateral triangle. Are you understanding it now?