Question

Bài 5 ạ

Answer 1

Bài 5:

AB<AC

nên \(\widehat{C}< \widehat{B}\)

=>\(\widehat{ADB}< \widehat{ADC}\)

Answer 2

 

AB<AC

nên ˆC<ˆBC^<B^

=>ˆADB<ˆADC

Answer 3

P/s: Mình tự làm nên sai thì cho mình xin lỗi ạ!

Answer 4

\(\text{Bài 5:}\)

\(\text{Ta có:}\widehat{ADB}=\widehat{DAC}+\widehat{DCA}\text{(góc ngoài)}\)

\(\widehat{ADC}=\widehat{DAB}+\widehat{ABD}\text{(góc ngoài)}\)

\(\text{Do AD là phân giác }\widehat{A}\)

\(\Rightarrow\widehat{DAC}=\widehat{DAB}\)

\(\text{mà }AB< AC\)

\(\Rightarrow\widehat{ACD}< \widehat{ABD}\)

\(\Rightarrow\widehat{ADB}< \widehat{ADC}\)

Bài 6 mik ko bt:<