Question

if triangle ABC is congrunt triangle DEF and angle A= 50°, angle F=60° then find angle B

Answer 1

since ABC is congruent to DEF 
 angle A = ang. D
ang. B = ang. E
ang C = ang. F..... (i)
by CPCT


also ang ( A + B + C) = 180
50 + B + C = 180 
from (i)
50 + B + 60 = 180
110 + B = 180 
B = 70 

Answer 2

heya

here is ur answer
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given :- ∆ABC is congruent to ∆DEF

so by CPCT

<A= <D

< B = <E

<C = <F

so in ∆ABC

<A = 50°

<C = <F =60°

<B= ?

v all know that sum of interior angles of a triangle is equal to 180°

so

<A+ <B + <C = 180°

50° +. <B + 60° = 180°

<B + 110° = 180°

<B = 180° - 110°

<B = 70°

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hope this helps u