Question

what is common between 3 angles of a triangle and a linear pair?

Answer 1

In traingle we know sum of all angles equal to 180° .
Let ABC is a triangle then,
A + B + C = 180°

Linear pair :- pair of two angles whose sum always equal to 180°
Let AOB and BOC are two linear pair angles then,
AOB + BOC = 180° .

Hence, common between three angles of triangle and linear pair :-
both cases sum of angles equal to 180°

Answer 2

in triangle the sum of all the angles is equal to 180°
In ∆ PQR
angleP+ angleQ+angleR =180°

in linear pair sum of 2 angles are 180°

common between 3 angles of a ∆ & linear pair is that both have the the sum of angles equal to 180°