Answer : The correct option is, (B) [tex]60^o[/tex]
Step-by-step explanation :
As we are given a triangle ABC.
Given:
[tex]\angle A=40^o[/tex]
[tex]\angle B=80^o[/tex]
Property of triangle : The sum of the interior angle of a triangle is equal to [tex]180^o[/tex]
That means,
[tex]\angle A+\angle B+\angle C=180^o[/tex]
Now put all the value of angle in this expression, we get:
[tex]40^o+80^o+\angle C=180^o[/tex]
[tex]120^o+\angle C=180^o[/tex]
[tex]\angle C=180^o-120^o[/tex]
[tex]\angle C=60^o[/tex]
Therefore, the value of [tex]\angle C[/tex] is, [tex]60^o[/tex]
