Question

Which of the following form the three angles of a triangle.

$a)\{{90}^o,{30}^o,{50}^o\}$

$b)\{{40}^o,{40}^o,{100}^o\}$

$c)\{{50}^o,{60}^o,{70}^o\}$

$d)\{{20}^o,{30}^o,{40}^o\}$

• A. $d$ and $c$
  
• B. $b$ and $c$
• C. $a$ and $c$
  
• D. $a$ and $d$
  

Answer 1

The correct option is B $b$ and $c$

Sum of the angles of triangle is $180$degrees.

$a)90+30+50=170$ degrees

Hence it is not a triangle

$b)40+40+100=180$ degree,

Hence it is a triangle

$c)50+60+70=180$degrees

Hence it is a triangle

$d)20+30+40=90$ degrees ,

Hence it is not a triangle.