viennadona2009
viennadona2009 viennadona2009
  • 01-02-2022
  • Mathematics
contestada

ZA and B are supplementary angles. If m_A = (x – 18)° and m
ZB = (x – 20°, then find the measure of ZB.

Respuesta :

saharamagar2020
saharamagar2020 saharamagar2020
  • 01-02-2022

Answer:

Step-by-step explanation:

  x-18+x-20=180(being supplementary angle)

or,2x-38=180

or,2x=180+38

or,2x=218

or,x=218/2

   x=109

now,

ZB=x-20

   =109-20

   =89

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