Bài tập: Tổng ba góc của một tam giác có đáp án

A. ${90}^0$

B. ${180}^0$

C. ${100}^0$

D. ${120}^0$

A. $\hat{B}+\hat{C}={90}^0$

B. $\hat{B}+\hat{C}={180}^0$

C. $\hat{B}+\hat{C}={100}^0$

D. $\hat{B}+\hat{C}={60}^0$

A. ${34}^0$

B. ${35}^0$

C. ${60}^0$

D. ${90}^0$

A. ${40}^0$

B. ${50}^0$

C. ${49}^0$

D. ${98}^0$

A. ${40}^0$

B. ${50}^0$

C. ${49}^0$

D. ${60}^0$

A. $20°$

B. $40°$

C. $60°$

D. $80°$

A. $130°$

B. $140°$

C. $50°$

D. $40°$

A. $45°$

B. $85°$

C. $90°$

D. $180°$

A. $\hat{D}=25°;\hat{F}=75°$

B. $\hat{D}=25°;\hat{F}=25°$

C. $\hat{D}=75°;\hat{F}=75°$

D. $\hat{D}=75°;\hat{F}=25°$

A. $40°$

B. $50°$

C. $60°$

D. $70°$

A . $\hat{A}$ = 60 $°$ ; $\hat{C}$ = 40 $°$

B . $\hat{A}$ = 30 $°$ ; $\hat{C}$ = 50 $°$

C . $\hat{A}$ = 40 $°$ ; $\hat{C}$ = 60 $°$

D . $\hat{A}$ = 40 $°$ ; $\hat{C}$ = 30 $°$

A . $\hat{B}$ = 70 $°$ , $\hat{C}$ = 50 $°$

B . $\hat{B}$ = 30 $°$ , $\hat{C}$ = 60 $°$

C . $\hat{B}$ = 40 $°$ , $\hat{C}$ = 80 $°$

D . $\hat{B}$ = 80 $°$ , $\hat{C}$ = 40 $°$

A . 40 $°$

B . 50 $°$

C . 60 $°$

D . 70 $°$

A . 45 $°$

B . 55 $°$

C . 60 $°$

D . 30 $°$

A . $\widehat{BEC}$ > 90 $°$

B . $\widehat{BEC}$ < 90 $°$

C . $\widehat{BEC}$ > $\widehat{EBA}$

D . $\widehat{BEC}$ > $\widehat{ECB}$

A . $\widehat{AEB}$ = 70 $°$ , $\widehat{BEC}$ = 110 $°$

B . $\widehat{AEB}$ = 106 $°$ , $\widehat{BEC}$ = 74 $°$

C . $\widehat{AEB}$ = 74 $°$ , $\widehat{BEC}$ = 106 $°$

D . $\widehat{AEB}$ = 60 $°$ , $\widehat{BEC}$ = 120 $°$

A . 80 $°$

B . 110 $°$

C . 100 $°$

D . 105 $°$

A . $\widehat{ADC}$ = 80 $°$ , $\widehat{BDC}$ = 100 $°$

B . $\widehat{ADC}$ = 70 $°$ , $\widehat{BDC}$ = 110 $°$

C . $\widehat{ADC}$ = 80 $°$ , $\widehat{BDC}$ = 120 $°$

D . $\widehat{ADC}$ = 60 $°$ , $\widehat{BDC}$ = 120 $°$

A. ${34}^0$

B. ${35}^0$

C. ${60}^0$

D. ${90}^0$

A. $20°$

B. $40°$

C. $60°$

D. $80°$

A. $\hat{D}=25°;\hat{F}=75°$

B. $\hat{D}=25°;\hat{F}=25°$

C. $\hat{D}=75°;\hat{F}=75°$

D. $\hat{D}=75°;\hat{F}=25°$