Question

Plz solve this Ques 15

Answer 1

AB is the longest side of the triangle ABC.

then,
AB > AC
(as AB is the longest side then, it is longer than any other side)

angle C > angle B -----------(i)

and

AB > CB
angle C > angle A ----------(ii)



adding (i) and (ii)

2 ( angle C) > angle A + angle C

by adding angle B in both sides

3 ( angle C) > angle A + angle B +angle C

as sum of all angles of a triangle = 180°

so,
3 (angle C) > 180°
angle C > 60°

Thus, proved that Angle C is > 60°.