Question

An exterior angle of a triangle is 105 degree . One of its interior opposite angle is 60dgrees. Find all angles of triangle

Answer 1

Answer:a=60°

ext angle + int angle = 180°

105 + int angle = 180°

Int angle = 180 - 105 =75°

b=75°

Step-by-step explanation:sum of int angles of a triangle= 180°

Angle a + angle b + angle c = 180°

60 + 75 + angle c = 180°

135 + angle c = 180 °

Angle c = 180 - 135 = 45°