Question

plzz help meee plzz​

Answer 1

HeY MaTe HeRe Is YoUr AnSwEr ❤

In ABC,
=> angle A + angle B + angle C = 180° ( angle sum property
=> 70° + angle B + angle C = 180°
=> angle B + angle C = 180° - 70°
=> angle B + angle C = 110° --------------------( 1 )
Now In BIC,
=> angle ICB + angle IBC + angle BIC = 180° ( A.S.P. )
=> ( angle ICB + angle IBC ) + angle BIC = 180°
=> 1/2 ( angle B + angle C ) + angle BIC = 180° ( by equation < 1 > )
=> 1/2 × 110° + angle BIC = 180°
=> 55° + angle BIC = 180°
=> angle BIC = 180° - 55°
=> angle BIC = 125°

hope this will help you

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