A side of the triangle below has been extended to form an exterior angle of 79°. Find the value of x. ??????
- 100 point question

Answer:
x = 101 °
Step-by-step explanation:
Here give ∠ ACD exterior angles 79 °
[Angle Addition Postulate and definition of straight angle: ]
∠ACD + ∠ACB = 180
79 + n = 180
n =180-79=101
n = 101
[RevyBreeze]
Apply supplementary angle theorem
[tex]\\ \rm\rightarrowtail x+79=180[/tex]
[tex]\\ \rm\rightarrowtail x=180-79[/tex]
[tex]\\ \rm\rightarrowtail x=101[/tex]