Question

attachments below
Triangle ABC is shown below
The flow chart with missing reason proves the measures of the interior angles of ∆ABC total 180°
Which reason can be used to fill in the numbered blank space?

Definition of Supplementary Angles

Substitution

Definition of Complementary Angles

Angle Addition Postulate

Answer 1

Where is the attachment?

Answer 2

my bad

Answer 3

Alright one sec

Answer 4

Supplementary angle are angles that add upto 180 (which is a line).

Answer 5

Complementary angles add up to a 90 degree angle

Answer 6

An angle postulate is: http://www.google.com/imgres?imgurl=http://www.icoachmath.com/image_md/Angle%2520Addition%2520Postulate1.jpg&imgrefurl=http://www.icoachmath.com/math_dictionary/Angle_Addition_Postulate.html&h=144&w=144&sz=3&tbnid=S5hjXJ7ZeGrPdM:&tbnh=90&tbnw=90&zoom=1&docid=_bm95PDlrggfsM&hl=en&sa=X&ei=0webT46oAeS26QH_lsyIDw&ved=0CDMQ9QEwAQ&dur=1

Answer 7

And substitution is when you take a variable and put it into the place of another variable

Answer 8

I would use the supplementary angle definition :)

Answer 9

ty :3

Answer 10

:D No problem

Answer 11

You were wrong /:

Answer 12

LOOOOOOLL