Question

state which of the following are Triangles
a)angle 60, Angle B = 60, angle C = 60
b) angle p = 80 ,angle Q=70 angle R= 70

Answer 1

option a) is the answer

Answer 2

here a ABC is the triangle as the sum of all the interior angles of a triangle is equal to 180°.
In the other one sum of int. angles is greater than 180° and that's why PQR is not a triangle.