Question

If ∆abc is congrience to ∆def and angle a=50°,angle f=60°,then find angle

b. answer

Answer 1

triangle ABC and DEF It is congruent A=D, B=E,C=F
sum of triangle is 180 
Given A=50 ,F=60 
hence B=70 
because sum of triangle is 180, ABC,or DEF A=50,B=70, C=60 =180