zzzkoji11 zzzkoji11
  • 24-08-2022
  • Mathematics
contestada

please help and show workkk

please help and show workkk class=

Respuesta :

evgeniylevi
evgeniylevi evgeniylevi
  • 24-08-2022

Answer:

60°.

Step-by-step explanation:

if the task is 'to calculate the value of y' then

1) basic rule is: the sum of the angles is 180°;

2) according to the basic rule y+(y-30°)+90°=180°;

3) if to solve this equation written above, then y=60°.

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