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  • 15-09-2022
  • Mathematics
contestada

ZA and ZB are supplementary angles. If mA = (2x − 9)º and m
ZB = (2x +21)°, then find the measure of ZA.

ZA and ZB are supplementary angles If mA 2x 9º and m ZB 2x 21 then find the measure of ZA class=

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uu200550 uu200550
  • 15-09-2022

angle A = 30

(2x-9) = (2x+21)
     +9          +9
 2x=2x+30

-2x  -2x

=30

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