Question

What is the measure of 13 years ago

Answer 1

The interior angles of a triangle always add up to 180 degrees.

80 + 60 + x = 180

180 - 80 - 60 = x

x is your missing angle.

Answer 2

x=40.
Thank you! (:

Answer 3

Angle Sum Property of a Triangle :-
The sum of all the three angles in a triangle is equal to \(180^0\).

Answer 4

Thank you @TheViper !

Answer 5

np :)

Answer 6

yw. (: And exactly what @TheViper said. (: