Seudónimo Seudónimo
  • 14-04-2022
  • Mathematics
contestada

pls help quick!!
10 points

pls help quick 10 points class=

Respuesta :

Аноним Аноним
  • 17-04-2022

Answer:

The angle B = 70°

Step-by-step explanation:

The sum of angles of a triangle is 180°

=> 40°+(2x-30)°+(x+20)° = 180°

=> 40°+2x°-30°+x°+20° = 180°

=> 30°+3x= 180°

=> 3x = 180°-30°

=> 3x = 150°

=> x = 150/3

=> x = 50°

So,the value of x = 50°

now , angle B = (2x-30) = (2×50 -30 ) = (100-30) = 70°

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